Mountain Bike Size & Fit Guide

Frame size charts are a starting point, not a verdict. The bike that fits is the one your body sits comfortably on - and that varies by brand and geometry. Here is how to get it right.

Step 1 - Measure your inseam

Stand barefoot against a wall, place a book between your legs tight to the crotch, and measure floor to the book top. That is your inseam. Use it for standover, the most important safety check.

Step 2 - Check standover clearance

Straddle the bike. You want 2-5 cm of clearance over the top tube (more for dirt jump bikes, where you want lots of room to move). If you cannot clear it, go down a size.

Step 3 - Look at reach, not just height

Reach (distance to the bars) sets your riding position. Too long = stretched and tired; too short = cramped and twitchy. A short stem can fine-tune this without changing the frame.

Quick size reference (trail hardtails)

These are guides only. MEIRX builds the TJ985 and Candy in 24", 26" and 27.5" so most riders find a fit - and we customize geometry for OEM partners. Ask us about your market.