As the other reviewer writes, these are not real TT bars due to their small size, and limited adjustment. But as he states they work well for getting down out of the wind. I've these on my Soma touringsport bike. I'm tall, 1.96m with long arms, but these little bars still work, however, I'd want a full size bar if doing a 40k TT. Just the ticket for what I want, getting a few miles in an aero position. Mine were missing the shims to mount on 26mm bar, but got on the phone, and Andrew had them in the mail that day, and received them in 2 days. Great service!