Joel, The top tubes of most MIT Rivs (including the MIT AHH and Atlantis) have significantly more slope than the older models like your Bleriot. Therefore the size for a given bar height with respect to seat height is smaller, and ones proper size based on pbh is smaller. Stand over is increased by about half the difference in size (with respect to a more horizontal tt model). Just changing the top tube slope should not cause perceptible differences in the ride qualities of an otherwise identical design. The new MIT Atlantis and AHH also have longer chain stays (and I presume wheelbases) than the earlier Toyo and Waterford versions. I think there are other threads that speak to how these versions ride and handling compare, but a short answer would be longer wb and sitting further from the rear axle should give a smoother ride over bumps.
On Sunday, June 28, 2020 at 7:10:42 AM UTC-7, Joel Stern wrote: > > > I was really confused at first at the A Homer Hilson, Appaloosa and the > new Atlantis. The sizing is very different than of old, like for my Bleriot > where I ride a 55cm bike, looks like on the Hilson and Appaloosa I would > take a 51cm and on the new Atlantis a 50. So my question for those that > follow this do any of these have a more relaxed geometry or a more > comfortable ride than my Bleriot which is already comfortable? What can > anyone tell me about the sizing changes? When Grant measured me years ago I > believe he had my PBH to 83 or a bit more, while when I had help from my > wife today it was on first measurement 80.645 and on second at 81.28 and a > third at 82.5. Now when Grant measure me I thought I would pass out (well > not really but it was a bit drastic) and the bike had no extra standover > for me. The Bleriot has a bit of standover so I have no doubt that I could > probably go down a bit. It also looks like the TT have gotten even longer > on these bikes, not maybe the added degree of slope makes that a non issue > and maybe there is something there with position of the rider on these. > Do the longer chain stays contribute to more comfort? > I also ride upright. > > So I guess I am confused. > > Any input is appreciated. > > Thanks, Joel > -- 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 rbw-owners-bunch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/b07f499d-a176-4009-b0b3-152c3efb7df4o%40googlegroups.com.
