Go Back  Bike Forums > Bike Forums > Fitting Your Bike
Reload this Page >

Road Bike Sizing

Fitting Your Bike Are you confused about how you should fit a bike to your particular body dimensions? Have you been reading, found the terms Merxx or French Fit, and dont know what you need? Every style of riding is different- in how you fit the bike to you, and the sizing of the bike itself. Its more than just measuring your height, reach and inseam. With the help of Bike Fitting, youll be able to find the right fit for your frame size, style of riding, and your particular dimensions. Here ya go..the location for everything fit related.

Road Bike Sizing

Old 12-17-14, 11:50 AM
Junior Member
Thread Starter
Join Date: Dec 2014
Location: Singapore
Posts: 18

Bikes: Giant Defy 0 2014

Likes: 0
Liked 0 Times in 0 Posts
Question Road Bike Sizing

Hey guys,

I've been on and off a few road bikes of different brands and (48 cm, 50 cm, 51 cm).

I understand the general feel of a road bike, but unsure if I'm riding the ride size.

I went on to Competitive Cyclist Bike Fit Calculator online, and provided these measurements (cm):

Inseam: 78.5
Trunk: 62
Forearm: 36.25
Arm: 67
Thigh: 55.5
Lower Leg: 52.5
Sternal Notch: 138
Total Body Height: 170

Got these results:

The Competitive Fit:
Seat Tube Range cc: 50.8 - 51.3 cm
Seat Tube Range ct: 52.4 - 52.9 cm
Top Tube Length: 55.9 - 56.3 cm
Stem Length: 11.2 - 11.8 cm
BBSaddle Position: 72.5 - 74.5 cm
Saddle Handlebar: 53.3 - 53.9 cm
Saddle Setback: 2.7 - 3.1 cm

Are these results fairly accurate for lads out there of similar height and inseam length?

Keithllzj is offline  
Old 01-01-15, 04:56 PM
Senior Member
Road Fan's Avatar
Join Date: Apr 2005
Location: Ann Arbor, MI
Posts: 16,933

Bikes: 1980 Masi, 1984 Mondonico, 1984 Trek 610, 1980 Woodrup Giro, 2005 Mondonico Futura Leggera ELOS, 1967 PX10E, 1971 Peugeot UO-8

Liked 677 Times in 517 Posts
Actually your Competitive Fit numbers don't look too bad. You might want to double-check your body measurements just to make sure (use a capable assistant to double check you), and to try the other fit options on the Competitive Cyclist site. The Competitive fit is for modern racing-type riding. More comfort can usually be had using one of the other two options.

My inseam is a little longer than yours though my height is 168 cm. This could be just a quirk of human variation, or suggest you're measurements to be off. Not that we must match, but it's worth it to check, right?

If you can find a site that gives you frame stack and frame reach, you might use those to double-check what you got from Competitive.
Road Fan is offline  
Related Topics
Thread Starter
Last Post
The 585
Fitting Your Bike
07-31-17 07:47 PM
Fitting Your Bike
04-26-16 11:59 PM
Road Cycling
07-23-14 10:53 AM
Road Cycling
05-18-14 09:59 AM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Your Privacy Choices -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.