🔧Struggling to find the perfect replacement REAR SHOCK for your mountain bike? STOP GUESSING! This is the definitive, step-by-step guide on how to UPGRADE your MTB suspension with 100% confidence.
⚠️We break down the 4 CRITICAL steps you need to know for a guaranteed fit:
1. Form Factor – Understanding the difference between “Standard” (two eyelets) and “TRUNNION” (side bolts) mounts.
2. Dimensions – How to correctly measure “Eye-to-Eye (E2E)” and “Shock Stroke”, and how stroke affects travel and sag setup.
3. Hardware – Deciphering “mounting hardware” (bushings, spacers) dimensions and the difference between Fox, SRAM, and unique frame-specific hardware.
4. Shock Tune – Decoding the “Rebound/Compression tune codes” (LCL, LRM, CMF) and volume spacers (tokens) to match your frame’s *kinematics and get a perfect ride.
Whether you’re moving from a RockShox Deluxe to a FOX shock, or just looking for an upgrade with better features, this video will save you time and money.
⌚ CHAPTERS (Jump to the technical section you need)
0:00 Introduction: Stop Guessing Your Shock Size
0:00:39 Step 1: Form Factor (Standard vs. Trunnion Mount)
0:01:46 Step 2: Dimensions (Eye-to-Eye, Stroke, and Sag)
0:03:19 Step 3: Mounting Hardware (Bushings and Spacers)
0:05:54 Step 4: Shock Tune (Codes, Volume Spacers, Kinematics)
0:07:22 Bonus Tips: Yoke Rotation & Tuning Advice
đź”— Full MTB Suspension Playlist:
What is your next suspension UPGRADE? Let me know in the comments below! 👇
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Great video. I recently upgraded my rear shock. Didn’t realize I had to get bushings for the eyelets. Santa Cruz sent me a link to the correct one at Jenson, and it was same for both eyelets. I also never thought about shock tune until your video. No idea what’s in store for me now.
step by step?
Can you use a shock with a longer travel? My bike is a Medium Lapierre Zesty AM fit 4.0. The current shock is a trunnion with 205mm eye to eye and 57.5mm stroke. Can I use a shock with the same eye to eye but 60mm stroke?
Can the sizes 210×55 and 200×65 mm be considered the same?
@LoveMTB – what was your primary motivation for changing your shock? 🤔I understand that this is more of a ‘how to’ video, but I’m curious why you were entertaining the change. What specific outcomes were you hoping to achieve? Thx!