I would never say that any Riv frames are designed around X tires , that's simply limiting. The clearances are like a balance between chainring sizes and the bend of the stays, chainstay length and the intention of designer. Meaning, it's all art !
Even with a frame design , each one is unique to that particular builder so there will always be slight variances of some kind. So your frames clearances simply are what they are. Rivendell may design the frames and even furnish some lugs, but to have them built they are like a contractor of sorts in relationship with builders around the world, not unlike other companies. In regards to what iamkeith said about the early mtb's , they did come with 1.95" tires even in 1982 . My 1983 Stumpjumper Sport came with the original "Stumpumper" tires that I believe were 1.95" and when I wore them out I replaced them with Crossroads 1.95" . I used a max tire of 2.05 on it, a Vittoria Free Climb. The rims were the by todays standards "quite wide" Araya 7x which I believe were 32+mm's so the tires mounted fairly true to size. No problems with clearance . I suspect the 26x1.75 written on the Araya may have been a source of confusion as this referred to the smallest recommended tire , though I ran Tricross 1.5's on and off no problemo. Those Stumpjumper frames were brilliant in the design of the chainstays and clearance and could have easily been reconfigured today to use wider tires and still have clearance for even "low q" triple cranks like the Sugino AT and TA Cyclotourist whihch came on the Sport($495 model) and Stumpjumper($750). Our early Bombadils could have used a design like that ! I always considered the Bomba the fit and ride I always wished the Stumpjumpers had because they were quite bad in that way. On Sunday, December 6, 2015 at 11:00:54 PM UTC-5, Chad wrote: > > I'm not sure if I have a odd duck here or not, but tire clearance on my > early double top tube 650b Bombadil is really tight. With a 650b x 2.0 > Quasi-Moto (actual width Is about 53mm on a Velocity Synergy rim), there is > maybe 3-4mm clearance at the seat stay bridge. Enough for the tire to roll > through but not much room for mud or rocks. I was thinking the Bombadil > was designed to fit the quasi-Motos as there are pictures of early > prototypes running around with this tire. I've also run the Schwalbe HS > 315 "Fatties" (true width 47mm) and Bruce Gordon Rock n Roads (44mm), but > it would be nice to fit at least a modern 27.5 x 2.1 MTB tire in there. > Just wondering if anyone else here has experienced this challenge? > https://flic.kr/p/Bsyew9 -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
