Bike Fit / Measurements

[Cataboo]

Depending on her stem angle or the replacement stem... she could compensate for that on the cervelo.

[lunacycles]

Be aware that if you are set up in the same position--butt and leg-wise-- relative to the BB/cranks on the Cervelo that you are on your current bike, due to the seat angle differences, the Cervelo will actually have a reduced reach, by 1-2cm.

[mauisher]

Thanks for your comment, Margo. I'm a bit confused though. I would think that if I'm going from a 75 deg seat angle to a 73 deg one that the net effect would be to increase the reach, not decrease it. If I'm not understanding this correctly, can you explain it to me? Many thanks, Sherry

[laura*]

I would think that if I'm going from a 75 deg seat angle to a 73 deg one that the net effect would be to increase the reach, not decrease it. If I'm not understanding this correctly, can you explain it to me?

Think of the bottom bracket as a fixed reference point. On the Cervelo, with its less steep seat tube, the top of the seat tube will be further back relative to that BB. At the same rider to pedal position, this means that the top tube has to reach further under the seat. And then, because the top tubes are nearly the same length, this means that the head tube is closer to the rider.

[lunacycles]

Thanks for your comment, Margo. I'm a bit confused though. I would think that if I'm going from a 75 deg seat angle to a 73 deg one that the net effect would be to increase the reach, not decrease it. If I'm not understanding this correctly, can you explain it to me? Many thanks, Sherry

On your current bike it sounds like the seat tube angle is too steep (so common on smaller frames) and you have had to push the saddle all the way back to get a good position. By doing this, you increased the reach on the bike.

With the Cervelo and the shallower seat tube, you very likely won't need to push the saddle back at all, and may even nudge it forward. This will reduce the reach relative to your old bike.

Hope that makes sense.

[mauisher]

Got it!!! Thanks very much for your help!