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The rear brake conversion went off without much of a hitch, but I eventually just broke down and bought a used Trek XO-1 for cross-duty. WATCH THIS BEFORE DOING A 650B CONVERSION! What fork you have at the moment? Also, stay tuned for more coverage on the Compass Switchback Hill and WTB Byway tires. Putting 650B wheels on 26" wheeled frames with cantilever brakes is really not practical. Since your bike is a bit older, I woudl advise you to check with a local bike shop! Hello, I have a 1991 trek 7000. Hi I have a voodoo hoodoo mountain bike and have 26 inch wheels can I put 27 inch wheels in my frame and forks thanks. do you think putting some 27.5 on will fit? The bottom bracket will increase in height by about 10mm reducing the stability of the bike very marginally given the higher centre of gravity. When I poste my bike on a popular facebook page, I got a lot of flak for that but who cares? If you are simply looking to swap tires on a bike, consider your bikes geometrythe reason there used to be 700A, B, and C. If a bike was designed around 25mm tires and you manage to squeeze 2 rubber into the frame, there will be consequences. Reconversion Therapy: 700c to 650b to 700c. I relayed my experiences with toe overlap and cautions about old, delicate 70s bikes in general, although her son was an ideal size for the frame. I have a 2014 26 in Trek Session 88 I received all two of the ones that were built, when I purchased the brand! With a 511% gear range, its even wider than 112 Eagle. Any questions on the matter? Hi, I have V-break in the rear. But I do know that you can convert from v-brakes to disc brakes in the rear. Thats very positive informative and simply put exactly what I wanted to know. Thanks, Heather. Your blog has a focus on bicycles for smaller riders and is full of wheel size conversions. The fork head tube angle has changed and its a bit twitchy, i changed stem for a shorter 30mm one, but going downhill with dropper feels awesome..looking at my old cannondale 04 jekyl might have to convert this.. That looks like a nice project! Paul|Mantel, I have a 2006 specialized bighit 3 will it be possible to convert the rear to 27.5? Can I fit 27 wheels to this bike. Can you fit 26 inch tires on a 27.5 rim and fork? Giant xtc 1, hardtail disc brakes (2009). Fox forks are the only forks compatible with 27.5 inch wheels. The result is terrible handling. I am thinking about trying these -- New MTB Road Bike V Brake Front set Green | eBay Anyone else run these brakes ? Keep yourself and your bike clean with road and mountain bike mudguards! There are also some adapters to fit on your frame. 2012 giant riegn 2. For instance, a 19-622 (700 x 19C) tire would theoretically have exactly the same outside diameter as a 38-584 (650 x 38B). Oh, you might be able to make it work, but it's not optimal. Converting your 26 mountainbike to a 27.5 or 650b wheelset isnt as hard as you might think. Pannier rack, frame bags and butterfly bars. Hello everyone!! Thanks! I myself will soon belong to the sinners club of 650B converters !. Im curious to know if Compasss stated width for the 38mm Loup Loup is actually 38mm. 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. Im still using 26 inch wheels built by merlin cycles when they where in Ormskirk lancs, XT hubs mavic 230 SBP rims. Thats going to have quite aneffect on both your steering response (fork trail) and the ground clearance from your pedals. So, chainstay length isn't usually the issue. There are some cheap rotors, and brake calipers out there. There have been some remarkable deals on new/leftover 700c disc brake bikes, and factory built 650B disc mtb wheels are very common now. Testing . We're also open Saturdays for walk-ins, 10am to 4pm, Rivendell Bicycle Works Ever Since 1994. The effect of the 650B conversion is to give one a chance to ride on wider tires, making the bike more useful and comfortable, and to provide for fender clearance that didn't exist with the larger wheel size. Rim Brakes on a 650 Conversion. 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. Also, I own a 60 cm, Bernard Carre built, 1973 Bertin C 37 with 170 mm cranks and medium clips. make sure you have enough side clearance with the tire sitting slightly higher. It may well be possible, but it is hard to say based on this information alone. We woulnt recommend changing the forks but this might give more room. But with 170mm cranks it seems OK after a few rides. According to Jan, We were thinking about how wide a tire can fit between a set of road cranks with narrow Q-factor. I dont know if there are v-brakes with longer arms. I believe your frame should be okay, but Im not too sure if your fork is compatible. How long a reach you will need will depend on the dimensions of your specific frame and fork. No it that wont work unfortunately. Will a 700c or a 27.5 wheel fit my bike? The larger the obstacle, the larger the advantage of a 29 inch wheel gets. I strongly urge readers to resist the foolish jargon, and to use either the traditional "650B" designation, or, better yet, the internationally-standardized 584 mm designation. Hello , i have a Specialized s works Enduro sl 2008 or 9 i dont really know now,. Fortunately, I eliminated the shimmy on my initial build by using different tires I switched from the ponderous Panasonic Col de la Vie tires to the comfortable, delightful and fast Loup Loup Pass tires from Compass.