Used and new bike size guide

 

Buyers Guide

Choosing the right size frame is very important. Whether you're after a run around, lightweight racing machine or a full on downhill beast having the right size frame for you will make all the difference. As previously mentioned actual sizes can vary between manufacturer but bikes advertised on onceridden.com will be sized as per the guide below. Remember this is meant to be a guide only and there is no substitute for getting on the bike you want to buy and taking it for a test ride to see if it fits.
 Rider Height (cm)  Rider Height (inches)  Size
148 - 158 4' 10" - 5' 2" XS
158 - 168 4' 10" - 5' 6" S
168 - 178 5' 6" - 5' 10" M
178 - 185 5' 10" - 6' 1" L
185 + 6' 1" + XL

 
 

Sellers Guide

Most frames will have the size written on them. This will either be stamped on the frame or more commonly displayed on a sticker. As you can see below mountain and hybrid bikes are usually measured in inches whereas road bikes are traditionally measured in cm. You will need to list the size of your bike when placing an advert on onceridden.com the guide below should help you chose the correct size.
 

Hybrid & Mountain Bikes

 Frame Size (inches)  Size
4' 10" - 5' 2" XS
4' 10" - 5' 6" S
5' 6" - 5' 10" M
5' 10" - 6' 1" L
6' 1" + XL

Road Bikes

 Frame Size (cm)  Size
47 - 50 XS
51 - 53 S
54 - 55 M
56 - 58 L
58+ + XL