Hub Size O.L.D. Guide

Front Hubs O.L.D.

• 100 mm — this is the most common size for Road & MTB
• 110 mm — Boost MTB front 
• 120 mm — uncommon - found on older bikes
• 140 mm — rare - bolt-on/touring variants 
• 150 mm — some fat-bike or cargo bikes

Rear Hubs O.L.D.

• 120 mm — older track 
• 126 mm — 1980's steel 5/6sp MTB | Older road - including 27 x 1 1/4
• 130 mm — early 1990's 6/7sp MTB | modern ROAD Quick Release
• 135 mm — modern MTB 
• 142 mm — modern thru-axle MTB
• 148 mm — Boost thru-axle MTB 27.5 & 29
• 157 mm — Super Boost - DH
• 150–190+ mm — Fat bike

Note this is a general guide only as the 1980's thru to 2000 was a transition time for hub width - particularly MTB.

Please feel free to email us any comment or additions we need to keep this list upto date & useful for our users.