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sites with tips on adjusting fit...(6 posts)

sites with tips on adjusting fit...don440
Jun 12, 2003 9:28 AM
on a bike that is either too big or too small. could someone point me in the right direction. i'm about 5' 7" and have a trek 2200 that's a 56cm. i have it adjusted where it is fairly comfortable, but i'd like to know if there is more info out there that might explain in more detail the effects of certain adjustments, etc. i finally logged in a longer ride, 60 miles, and felt pretty good leg and back wise, but my feet kept falling asleep if i didn't conciously wiggle my toes.

after reading the thread below, i'll see what i can find about this KOPS method stuff.
probably too big ... feet issue might be your shoes ...Tahoe Gator
Jun 12, 2003 10:45 AM
56 cm seems big for 5'7". I am 5' 9.5" and ride a 55 cm with a 55.7 cm top tube and a 120 mm stem. Check out www.wrenchscience.com for their fit tool.

Regarding your feet falling asleep, doubtful it is your frame size; it's probably your shoes. Falling asleep is usually from lack of circulation, which is caused by restricting blood flow from too tight of shoes.
probably too big ... feet issue might be your shoes ...don440
Jun 12, 2003 11:06 AM
yeah, i'd read about the cleat placement, tight shoes etc., i'll ride with them a little looser next time. i definitely knew the bike would be on the big side, but i basically bought it new for $800, i couldn't pass it up. thanks for the link.
If your saddle is up to high, forcing you to toe down, your toesbill
Jun 12, 2003 1:48 PM
can go numb. I lowered my saddle a couple of mm (by far, IMHO, the most sensitive dimension of fit, and one of the easiest to fix -- go figure), and cured the problem. Of course, ill-fitting shoes can do it, too.
not necessarily....C-40
Jun 12, 2003 5:04 PM
A 56cm Trek measures 54cm c-t. Their sizing is misleading. Whether the size is correct depends on the rider's inseam as much as his height.

I'm only 5'-6.5" tall, but have an 83cm inseam. I ride frames in the 53cm to 55cm range, measured c-t. If i owned a Trek it would be a 56cm, but I would probably need a relatively short 90-100mm stem for my short torso.

Treks do have relatively long top tubes, which may require a shorter than average stem.

Try www.cyfacusa.com for decent fit info.

One quick measurement that indicates the proper vertical frame size is the height of the saddle above the top tube. 16-18cm, measured near the (level) nose of the saddle indicates relatively accurate sizing.
try Bicycle SportsTime Trial dot org
Jun 12, 2003 11:23 AM
there is more info on fit at www.timetrial.org