Thanks Jim That is kind of my leading hypothesis. But, I just find things like that curious
On Tue, Sep 8, 2009 at 10:42 PM, Jim Thill - Hiawatha Cyclery < thill....@gmail.com> wrote: > > Well, the 78-degree vs 72-degree ST changes the mechanics of your > pedal stroke quite a bit. Now (on the Hillborne), relative to your hip > joint, your knees and feet are farther forward, and it may simply be > harder to ramp up to the high RPMs in that position. I'm no expert on > biomechanics, but that seems a more likely factor than any other > difference between the 2 bikes. > > There's also the psychological part, which somebody already mentioned. > In the retail bike business, we refer to this cause of various > problems and perceptions as a "loose nut on the saddle". > > On Sep 7, 7:09 pm, Fai Mao <i.am.fai....@gmail.com> wrote: > > Yes the 78 degree seat tube is correct on the old bike. It is a retired > > triathlon specific bike and is VERY upright, very short and very stiff. > If > > you are on an aero type bar it is actully not uncomfortable because most > of > > your weight is on your arms. But when you sit up it is like driving a > > broomhandle........ It is now relegated to a trainer. I also have an old > > Battaglin road bike that I still ride. > > > > The reason that I thought a longer chain might cause a slower cadence is > > because there would be more slack in the chain which causes some chain > slap > > and that would change the feel of the bike. To prevent chain slap due to > a > > sligtly unevan pedal cadence I might have slowed down. > > > > As to dumping the computer, it is my only cycling vice. I am probably a > > bigger retrogrouch than Grant Petersen in many ways but I like to see how > > fast I am going. It also provides the time and I hate to wear a watch > while > > riding. I also have torn ligaments in my ankle so the cadence number is > > useful to me to keep the ankle from swelling. If I push high gears for > too > > long I cannot walk the next day because the right foot swells. That's why > I > > no longer do the tri-thing because running and swimming exacerbate the > > problem. > > All of that is a long way of saying I just found it curious that I > naturally > > use a lower cadence on the Sam than on my other bikes > > > > > > > > On Mon, Sep 7, 2009 at 9:49 PM, PATRICK MOORE <bertin...@gmail.com> > wrote: > > > > > On Sun, Sep 6, 2009 at 10:33 PM, Fai Mao <i.am.fai....@gmail.com> > wrote: > > > > >> Several 100 miles into the new Sam Hillborne and I’ve noticed > > >> something odd. > > > > >> It seems that I now ride a lower cadence than on the old bike. [...] > is > > >> this something to do with going from a > > >> 78 degree seat tube to 71.5 degree seat tube? Or, is it possibly a > > >> function of the longer chain? > > > > > 78 degree seat tube? Is that correct? > > > > > Even if "78" is a mistake, and you went from a 73 to a 71.5, that would > > > (all else equal) put you further behind the bb, and thus encourage a > more > > > powerful and slower cadence. Look at what happens when you climb: you > shift > > > backward on your saddle. But when you sprint, you shift forward. > > > > > As for the longer chain, how do you figure that would slow your > cadence? I > > > can't get it to compute. > > > > > FWIW, I made the mistake long ago of chasing KOPS -- knee over pedal > > > spindle, the conventional saddle fore-and-aft fitting guide -- and > ended up > > > with my saddle allllllllll the way forward on the rails. Grant advised > me to > > > shove it back and bring the bars in and up, and, now, almost 15 years > later, > > > I use a rubber mallet to ensure my saddles are all the way back on the > post > > > (I use a post with considerable setback). AND, I have gone from > spinning low > > > gears fast to pushing larger ones slow, and I feel much stronger and > more > > > comfortable; in particular, my back is more comfortable even though my > bars > > > are still 2" below saddle. > > > -- > > > Patrick Moore > > > Albuquerque, NM > > > Professional Resumes. Contact resumespecialt...@gmail.com > > > > -- > > Fai Mao > > The Blogger who sometimes responds to comments > > > -- Fai Mao The Blogger who sometimes responds to comments --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en -~----------~----~----~----~------~----~------~--~---
