I'm starting to think that the slack seat angle is the key to how Grant is fitting a wider range of riders to each size. Most of us riding Brooks saddles wind up with them all the way back. On the Sam Hillborne that might no longer be true. On a given size, the shorter riders in the range would scoot forward a bit, giving an effectively shorter tt while still having a decently slack effective seat angle. Moving the saddle forward 1 cm is about like steepening the seat angle 1 degree, so the 52 Sam would fit like a bike with a 72.5 degree seat angle and a 1 cm shorter top tube - a reasonable fit for many riders.
I'm OK with that approach, but... I use an 8 cm stem on my 56 cm Riv Road that has a 57 tt, and it can still feel long to me (Grant would put me on a 58 or 59 SAluki/AHH - tt more like 58). My nominally 56 cm Kogswell has about the same 54.5 cm 'theoretical' tt length as the 48 Sam, and I have an 8 cm stem on that as well (6 degree threadless stem, it's probably equal to the extension of a 9 cm Nitto). I tried to make the Kog too short to see how it felt, and I only marginally succeded. I wouldn't race on it, but it's comfortable at my normal pace. Short top tubes seem to work for me! Gino, note that the size ranges have shifted on the Sam geometry page. A 52 would be recommended tor 70 - 75 cm saddle heights instead of 71 to 77. That puts me (74 - 74.5 cm saddle height) at the top end of the scale for a 52, flirting with the bottom of the range for a 56 with an even longer tt! Bill On Dec 21, 6:09 pm, Mike <[email protected]> wrote: > I noticed the same thing. I'd ride a 60cm which has a TT of 62. That's > long. Even with the bars level with the saddle I'd have use a 9cm > stem. But then again, maybe not. I could be missing something here. I > wouldn't push the saddle forward to "shorten" the TT. > > --mike > > On Dec 21, 5:38 pm, "Bill M." <[email protected]> wrote: > > > > >http://www.rivbike.com/#product=50-700 > > > Is it just me thinking so, or do those look like some pretty long top > > tubes? I guess with a 71.5 ST angle, I might be able to scoot the > > saddle forward a bit instead of having it all the way back and wishing > > for more SP offset. > > > Bill --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en -~----------~----~----~----~------~----~------~--~---
