Road Bike, Cycling Forums banner
1 - 4 of 4 Posts

· aka Zoo
Joined
·
763 Posts
Discussion Starter · #1 ·
Typically how much shorter is the top tube length of a time trial bike compared to what you would normally use for a road bike? I ride a 54cm top tube on my road bike right now, if I get a time trial bike with a seat tube angle of like 74.5-75 degrees and say a 250mm length bar extenders, would I be looking for a 53cm top tube? Would I want to go shorter than that?
 

· Registered
Joined
·
597 Posts
Time trial bikes are funny in that they are all measured differently. The general rule of thumb is to get a TT bike with a top tube a few centimenters shorter than what you ride in a road bike. Otherwise, you may find your arms too stretched out in the aero bars and have shoulder/upper neck pain.
 

· Registered
Joined
·
108 Posts
Yes, time trial geometry can get funky. Definitely go to at least one or two stores and check it out. I personally ride a medium Giant OCR series road bike with a virtual top tube of 55 cm and ride other brands 53-55's. My cervelo p2sl time trial bike was a 51, which is a small once everything else was appropriately adjusted (stem, aerobars, seat).

Good luck.
 
1 - 4 of 4 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top