So, if youre running non-disc brakes, youll need to have your brake mounts moved or find brake calipers with a really long reach. Thanks. It may well be possible, but it is hard to say based on this information alone. But with 170mm cranks it seems OK after a few rides. Thank you for your question. Not all 26 inch frames are compatible with a 27.5 wheel, as it can easily rub on the stays or bottom bracket. Thanks, Greg. I have a 2006 Iron Horse Maverick, is it possible to convert to modern components and 27.5 wheel set? Hi Md, To achieve this the carbon was worked on the carbon bridge so as to leave enough clearance. Paul|Mantel, I have a 2006 specialized bighit 3 will it be possible to convert the rear to 27.5? I know that this is an odl post but I found that this is very useful and instructional! Hi Tom, Five years in still smooth. conversion - Is there any kind of adapter to mount v-brakes or 700C x 35mm = 692mm = 27.5 x 2.1 The Bombtrack Audax has a 65mm BB drop (L), Surlys Midnight Special shows 65mm, Chumbas Terlingua has about 66mm, and the Masi Speciale Randonneur 650B has 70mm. Find out what we learned about 650B, everything you need to know about such a conversion, and details about the specific components we selected. One and Two are fancier, but cost more. A lot of bikes are being converted to 27.5 and theres a lot to be said for doing so, but it doesnt use the full potential to be had from a 27.5 wheel. If you have a racing-type bike of good quality, but wish to make it more versatile, sturdy and comfortable, converting to 650B may be just the ticket. The good news is that he inspired this thoughtful explanation, which lots of us can now share! No. Now though, theres the 27.5 wheel, which for some is the best of both worlds. do you think putting some 27.5 on will fit? There are other factors that influence this, but a 700c frame (your starting point) has a different BB drop than a frame thats designed for 650B wheels. There are a few carbon replacement forks out there now, but the Fyxation Sparta is available at the right price and with all the right features. They are trying to get people to call it "27 five," as if it were halfway between the MTB "26-inch" and "29-inch" sizes. Has anyone done this on such an old bike? These conversions made more sense when there was a shortage of 650B frames, but thats not the case anymore. The slots don't allow for quite enough adjustment to get the brake pads right in the center of the sidewall, but it's close enough and I get plenty of braking power. BB Drop is the distance between the height of the hubs and the height of the bottom bracket at the center of the crank bolt. A lot of people have heard about the advantages that larger section tires can offer, but aren't ready to take the plunge and invest in a custom bike. I am thinking about trying these -- New MTB Road Bike V Brake Front set Green | eBay Anyone else run these brakes ? This is why the diameter of a bikes intended wheel and tire combo should be scrutinized. [QUOTE=Ed-B;2268363]The thing to do would be to get better brakes for the 26" wheels. She has 26 wheels. The numbers seem to work out where my 2.25 tire on the 26 rim is 673mm diameter vs my desired conversion is 45mm on 650b rim is 674mm. Avid Single Digit 5 brakes work for me on velocity/weinmann rims. Hola, tengo una Spec Stumpjumper FSR Comp 2008 de 26. Mostly, its the frame, and specifically, its the space available from the inside of the seat stays, chain stays, and fork blades at the point where the tire passes them. BMX-type calipers and centerpull calipers will commonly have adequate reach for this application. If you have any further questions, feel free to send us an email. Im curious if I can convert the 26 to 27.5. Thank you for the cool compliment! Several 700C bike models, such as the Marin Four Corners, switch to 650B for their smaller sizes to maintain proportional geometry. That makes the naming convention behind Compass Switchback Hill tires click, right? I have the same bike. If you really need so much seat pillar projecting from the seat cluster and such a high riding position, I suggest you get a frame that is more appropriate to your inner leg and body length. Few questions if anyone can help. Appropriately, the Switchback Hill was named after a pass on the 360-mile Oregon Outback gravel route, where the gravel is quite loose. Pannier rack, frame bags and butterfly bars. If you have an older bike, it likely takes a nutted style caliper, and while Tektro makesor at one time did makethe 559 in that older style, we dont carry it and dont know (because we havent researched) who does. The Bikepacking Journal is our biannual printed publication. The consent submitted will only be used for data processing originating from this website. I have a 2006 Gary Fisher Trax Fat Possum. As the wheels are 1.5 inch larger than before, your bike will stand 0.75 inch taller. Paul Motolites will take care of the rear brakes. But unfortunately, I think the local bike shops were right. Paul used to offer the long version of a V brake with straight cylindrical arms, and there you could raise the pads to covert a 26" frame to 650b, say, but taking 700c down to 650b wouldn't work too well. Thanks. These are not, however, the only options. Rim Brakes on a 650 Conversion | Page 2 | Mountain Bike Reviews Forum Rides a Trek Top Fuel 9.7 SL 2018. Did you find out if its possible to fit 27,5 inch weels? On my Velocity Synergy 650b rims, these tires are about 37 mm wide running them at 46 psi rear and 42 psi front. I stock them (165s) in just about everything I carry, and sell maybe two per year, total, vs. dozens of the other sizes. Thx. As far as I can see, the frame wont be a problem, bus to be sure you should have your local bikeshop check it. If you have other questions on the topic, feel free to ask our customer support. If you need a good suspension fork, Manitou make the Markhor fork in a 26, 27.5 and 29 version. Hi Jessie, Hi Jason, Thank you for your question. A while back I received a hostile diatribe in my comment queue about my Meral 650b conversion. Understanding Bike Fit: How Does It Work? However..he designed the bike around 700c wheels and would be astonished that you have fitted 650B, thereby upsetting all the correct design features that he had used in the frames constructions ie head angle, front end clearance, fork rake and trailall those important features that govern how a bike handles..OH! Shimano GRX groupsets An overview of all Shimano Gravel bike groupsets, Safe Bike Helmets Helmets with MIPS, WaveCel, SPIN and KinetiCore. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[468,60],'sheldonbrown_com-banner-1','ezslot_2',821,'0','0'])};__ez_fad_position('div-gpt-ad-sheldonbrown_com-banner-1-0'); As if bicycle tire sizing wasn't already confusing enough, wrong-headed marketeers have recently tried to popularize a fourth designation for the 584 mm tire size! While one manufacturer measures the product on the inside and ends up with 261.95, it may well turn out to be 262.25 when measured on the outside. But in a well thought out 650B conversion, theres no need to worry about changing the fork. The angle a 29 inch-wheel needs to overcome in order to get over an obstacle is smaller than the angle required by its 26 inch counterpart. I myself will soon belong to the sinners club of 650B converters !. Probably not, and if you cant, youll need to get brakes with a longer reach. A lightweight 650B wheel set with slicks can be over 1.5kg lighter than a heavy-duty touring wheel set with puncture-proof tyres. The thing to do would be to get better brakes for the 26" wheels. i took my drop bar conversion MB-3 out the other day, and must say, i really do like the geometry and the fit with the drop bars. The derailleur and shifter are extremely solid, and it gives you a lot of options. Ive got a Raleigh mountain bike, Fox forks are the only forks compatible with 27.5 inch wheels. Here are five useful equivalents: 700C x 23mm = 668mm = 650B x 42mm Check out their 24mm IW AdventureCarbon wheels, affordable 29mm IW TrailWide, and their Dynamo specific wheels. I understand the concept of upgrading forks, but as Im just getting into the sport recreationally, Im ignorant when it comes to doing such a modification. I but 27 in wheels for it. There may be other sources on the internet, but here is oursand it is 100 percent true. Its not an altogether exact science, since the 700 and 650 numbers dont translate. Take care yall . Ive a voodoo Bantu Ive turned into more of an adventure bike, running the original wheel set with schwalbe land cruiser tyres. In the old days, with 20mm tires, tire drop was 3mmnot a big dealbut the Switchback Hill 48mm tire will drop about 7mm when the rider is on the bike! Jan also suggested that tire drop is independent of rider weight, and that for this type of tire, its appropriate for air pressure to be set at about 15% tire drop, almost like suspension sag. Even though no one seems to know what does cause shimmy, I think we can say for certain that it is not caused by the wrong combination of rake, trail and head angle. which of course a 650B conversion does not affect anyway (rake and head angle being impossible to change without changing the fork). Understanding Bike Fit: How Does It Work? Maybe you have a cycling friend with some 27,5 wheels? The angle a 29 inch-wheel needs to overcome in order to get over an obstacle is smaller than the angle required by its 26 inch counterpart. Another misconception is that a 650B conversion causes fork shimmy. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[468,60],'sheldonbrown_com-large-leaderboard-2','ezslot_3',822,'0','0'])};__ez_fad_position('div-gpt-ad-sheldonbrown_com-large-leaderboard-2-0'); Last Updated: Please if you have any idea. You can get by with 1mm, but your wheel may not stay perfectly true forever, so well, 10mm (for a 5mm per side) clearance is our recommended minimum. For the same type of tire, you need .5 .75 inches for the extra radius. By having two different wheel sets, you can transform your bike depending on what type of rideyoure planning on doing. Info needed on cantilevers for 26 inch to 650b conversion - Google Groups They will cost you a pretty penny though. With new 650B bikes popping up monthly, now seems to be its time. Putting 650B wheels on 26" wheeled frames with cantilever brakes is really not practical. Its actually been around for quite some time (see boxout below). Pelle|Mantel. Long-reach dual-pivot sidepull brakes also work. You want to just pop on some 650b wheels onto your 700c frame/fork. More air and rubber, same gear ratios. Hi. I have a 2000 Gary Fisher Wahoo 26er. When I look up pictures of your bike Im afraid a bigger wheel will not fit in the frame. Most disturbing about this rant is the ridiculous concept that style trumps comfort when setting up a bike for a particular rider. already converted front fork to a 27.5 203mm but was wondering if I purchased a 27.5 rear triangle and evo link, will the geometry line up or will I snap my frame. Keep yourself and your bike clean with road and mountain bike mudguards! The outer diameter of a262.00, a 65042 and a 70023 tyre is about the same. There is a snag though: your bike needs to be able to fit the larger wheels. Just how long of a reach youll need and whether you can even use your existing centermount or post mounts will depend on the dimensions of your specific frame and fork. As it happened, the bike industry came to describe and market road category (drop-bar) products in C and millimeters, and mountain bike products in inches. Need to change the forks also. Buyer's Guides . A particularly easy to read guide is available at Rivendells site. I have a Cannondale f800 with headshok that would make an excellent commuter. Inside The Revolutionary Honda Bicycle Gearboxes (All 3 Generations). https://problemsolversbike.com/produtravel_agents/, http://www.sheldonbrown.com/cantilever-geometry.html. BIKEPACKING.com is dedicated to exploration by bicycle. By switching to 650B from 700C, you suddenly gave clearance enough for medium-width tires, say 35-38 mm width, and for fenders, so you don't need to be a "fair-weather" cyclist. Other point: Old road bikes had 126mm rear hub spacing (and pre-1976 ones were usually 120mm). Also, I own a 60 cm, Bernard Carre built, 1973 Bertin C 37 with 170 mm cranks and medium clips. Its meant to take a 650b but is that front and rear? Any idea if the frame will accommodate? I think I have a bike with the best of both worlds; agile to overcome obstacles, rolling, light and extremely maneuverable. Sometimes form does need to follow function. The sun tour forks need to go thats the next upgrade rigid forks. You will get better results from simply fitting the fattest 26 tyre you can get away with and maybe converting your rims to tubeless. A bicycle made for 584 mm road tires, on the other hand, may or may not not have clearance for the fat knobbies. According to Jan, For a 650B x 48mm Switchback Hill, youll need a 70mm bottom bracket drop to achieve the road standard BB height of 265mm. Ask yourself the following questions. Attached Images. Was the braking better with non-aero levers? The cantilever bosses are fixed on these old steel frames, and your brake options are limited and braking performance is likely to be poor. Rear wheel clearance. Im curious to know if Compasss stated width for the 38mm Loup Loup is actually 38mm. Either way, there are a few preliminary details to evaluate: Brakes are most hardline obstacle when switching from 700C (622mm) to 650B (584mm) wheels. The situation as far as tire and rim availability has lately taken a turn for the better, and the future looks rosy for 650B. It means that the brakes need to be able to reach 12.5mm higher on 650b rims than on 26". The conversion of a standard 26 can come with a range of problems, such as inadequate frame clearance or geometry trouble. Fortunately for everyone 650B tires are far more plentiful now, too! How curious, why do people even read blogs or articles about things they dont agree with or have any interest in? Hello, I am a Cannondale Scalpel 27,5 from Portugal. Pedro, if youre going rigid on the fork, Soma have a nice one, curved, tapered blades and disc mount (made by Tange). The bicycle manufacturing industry has still not stepped up to the plate in terms of optimizing frames and wheel sizes for all riders of differing heights. Many thanks for a reply. 26 inch wheels is biggest size that will fit on frame size 17.5, so unfortunately you cant upgrade to 27.5 or 29 inch. Putting 650B wheels on 26" wheeled frames with cantilever brakes is really not practical. Hi, how about Trek 6000 series is it possible to swap it to from 26 to 27.5 wheels? And, last but not least, they make packing a bike easier for travel or shipping. Testing . we may end up putting 50mm tires on it to beef it up a hair though. to support us + get The Bikepacking Journal. I applaud your ingenuity, inventiveness and perseverance with this build. Do You Need One? Most drop-bar bikes with bigger tires will have a little toe overlap, but there is definitely a point at which it can become a burden. do you think putting some 27.5 on will fit? It was built with Vitus 788 tubing around a set of narrow, 700c rims. I have a small specialized stumpy fsr 2013, 26er.. lovely bike but wanted to update it..I bought a rear 27.5 wheel with bolt thru hub, and had a set of 29er forks and front wheel. They must be there. For what I can find about your bike, it seems that both the frame and the front fork are not suited for a conversion. Videos, Converting From 26inch to 650B on a Touring Bike. Start at our worldwide routes map to dig into our detailed guides with GPS maps and inspiring photography. Why not just slap a pair of chunky 700C x 45mm tires on your cross bike and call it a day? 26er to 650B conversion. V-brake question - Mountain Bike Reviews Forum Trek Navigator 2012 16.5, Alloy hubs; Bontrager 550 36-hole alloy rims, Bontrager Suburbia FIT w/super-soft padding, Threaded, semi-cartridge bearings, sealed, Tektro linear-pull brakes w/Tektro levers, Kraton inserts. Equipment . Pleased? If you use rim brakes you will need to make sure you have calipers with 12.5mm verticaladjustment. I also added brake bosses for cantilever brakes (more repurposed mountain bike parts), a rear brake . I have 1998 Toyota Tacoma, can I convert to 27? Last summer I built up an early 70s Japanese made Crystal road bike project that I purchased from a hoarders stash missing one of its wheels to resell. The brake only faintly determines your maximum tire. You also need to take in consideration how much space there is left for tire clearance. The frame is most probably a Special CNC 700C frame with superb workmanship, unfortunately my present purse would not allow me to have such a frame built to such a high standard. Avoiding toe overlap is the goal of any mindful builder, but mass produced frames for small riders achieve a bad result by slackening the head tube in order to shove 700c wheels into a small frame, thus avoiding toe overlap. The favorable 650B x 47/48mm tires, made popular by the 48mm Compass Switchback Hill and 47mm WTB Byway, have a similar tire diameter to 70028 wheels and tires. Can I convert from a 26 to 27.5? Babette | Mantel. However, this is by no means a complete list. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. I dunno if its possible but Im hoping someone may have some advice. I didnt see it listed in the blog. The image below illustrates the difference between the various sizes. The new eThirteen TRSr 9-46 cassette is one of the widest range 11-speed cassettes out there. I came across a 2009 Trek 4300 for a pretty good deal ($20) that needs some tlc and was curious if doing this conversion is difficult and is it worth doing so. It was obvious to me the bike was a scaled down road bike for smaller/younger riders with one 26 wheel still attached. Well, me and my travesty will see you out on the road. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. We woulnt recommend changing the forks but this might give more room. And, tires may actually widen over time. Why are there so many different wheel sizes out there anyway? But, much of the draw of 650B is that it enables the use of wide tires while maintaining a smaller and more manageable tire diameter. This not rocket science. Eventually, the C permutation won out, and people altered the outer diameter by mounting different tire sizes on a 700C rim. Toe overlap is an important issue for commuting riders who navigate tight turns in the rain on steep hills. While 26 slicks are broadly only available in 32, 38 and 50mm widths, 650B . So if you guys more known in these cases ,could help me to get an idea , i would appreciate you. Hi Aldrin, your frame could handle the change but the fork can t I m afraid! 650b conversion questions (rim brake) - The Paceline Forum Robin. (Many newer bikes have excessively high bottom brackets to begin with.). The world did not stop spinning due to my audacious acts. My wife rides a 49-52 size (700c). Cheers. Happy riding! Hi Freddie, Absolutely correct. She loves that darn thing! Considering the rear tire clearance and the rear shock it is best to hop in a local bike shop if it is possible. If you've learned a thing or two from me, consider supporting my independent resources, Bikepacking . PSA: Box Components v-brakes have enough adjustment to run 650b wheels on your old 26er frame. Where do I measure from to see if fits. its a 26 wheel set and I would like to modify it to a 27.5 wheel set. Unfortunately it is not possible to convert to a larger wheel set. Toe overlap can be eliminated by the builder, but there are sacrifices when building a small frame around 700c wheels. According to Jan Heine, You really need to factor the BB height with about 15% tire drop. Smaller wheel diameter = less trail. You'd be much better off trying 650B on a modern disc brake bike, unless you already own a sport-touring 700C caliper brake bike with sufficient clearances. I have a 2013 Specialized Enduro Evo (26er) I know the newer versions of this bike come standard with 27.5 or 29ers, but I am not sure if that was a frame modification from the factory, or if there is enough room on my model year to make the conversion. Figure out the blanks and youre on your way. Many bicycles from the 1970s on have way too high bottom brackets to begin with, so lowering the bottom bracket a bit will improve the bikes handling and cause no negative side effects. They were putting 650b and 650c wheelsets on their 26ers so that they could run skinny road tires on them without affecting the bikes geometry. But the Lorax maxes out at 40mm tires in 700C and more volume was needed. You wont always want to use your touring bike for touring. Agreed, Jim. Wider tires offer more floatation, a more supple ride, and are all around better suited to dirt and gravel surfaces. Click here to see more about my personal IRO Jamie Roy 650B conversion. Conversely, if a bike was designed around 700C x 45mm tires and you switch to 650B x 47mm, the bottom bracket will likely be far too low. The special edition 10th issue of The Bikepacking Journal is one you wont want to miss! All the while, in the expanding all-road and gravel scene, there has been a dedicated 650B fanbase who have been diligently working to restore it to its former glory. I was looking to also move from a 26 to a 27.5 and do not know if it is possible. Freddie Strong. Are Chainless Digital Drive Bicycles The Future of Cycling? Thats a job you can easily do yourself. Rock Shocks in the front. Click here to login, or start an account if youre not yet a member of the Bikepacking Collective. So the best 700C to 650B conversions happen on frames with good spacing between the fork blades, seat stays, and chain stays. Case in point, the Surly Straggler is offered in either 700C or 650B in sizes 52-58cm, 700C only in 60 and 62mm, and 650B only in 38, 42, 46, and 50cm models. 26 would be awesome to put 27.5 on it would ot be possible? I agree with the other commentors and will not echo whats already been said but wanted to add a conversion of sorts experience of my own for perspective. I've been an avid user of belt drive on my bikes for about 12 years now, and have clocked over 135,000km on these chain alternatives. I have 2006 Specialized Stumpjumper FSR Expert. I can only find a picture of your bike from the side. Hi Michael, 26 inch (559mm) wheels were the default mountain bike size for a few decades, while 700C (622mm) and 650B (584mm) were generally reserved for road and randonneur bikes. Not only is going to the smaller 650B diameter with large volume tires good for keeping low gearing, but it also keeps gearing roughly the same as what road riders are used to. The most common and appropriate 650B conversions involve a 700C bike built around 25-30mm tires. Which road bike or mountain bike lock suits you best? I dont want a new bike, I want to upgrade this one lol. Adding to the confusion, and counter to what the industry might lead you to believe, 650B is nothing new. That is where a 650B conversion maytransform your ride. The least you could do would be to buy one of those elegant Stronglight extra long headset lock-nuts that would both add about 30mms of extra grip to the quill while at the same time making the bike look less ridiculous than it does now 650B conversion | Thompson Custom Bicycles Im still using 26 inch wheels built by merlin cycles when they where in Ormskirk lancs, XT hubs mavic 230 SBP rims. I have a 2010 rocky mountain altitude full.sus carbon frame 26. They also include tubeless tape and valves, spare spokes, and a spoke key, all for about $445 USD. I have a trek 9.8 with fox suspension and frame size 17.5 on 26 and can i upgrade to 27.5 or 29, Hi Gan, Hello, I have gt force 3 from 2011, will that fit 27,5 anykind? I have bought a Marin Attack Trail 2008. Q2: How bigga tire will I be able to fit? Continental or Michelin could have the ones you are looking for. I have a 2010 specialized Enduro that has 26 wheels and would be so much better on some 27.5s but I dont really know how to go about the swap, Hey Brayden did you manage to 27.5 on the bike?