The original Mezzer thread got enormous and despite the huge amount of good tech, it is really spread out and hard to access.
I figured that I would do my best to consolidate the tech info. Feel free to PM me any specific info and I can add it to this post.
Let's do our best to keep the discussion tech based.
New Owner To-do List:
User Setups and Pressure Calculator:
Official Guides:
Replacement Parts:
Dougal's 1-page general purpose setup guide:
IRT Setup Guides (Not Mezzer Specific):
Damper Tuning:
jmvar's Tear-down Guide for Compression Shim Removal:
Service info from Dougal:
![1914730]( "1914730")
![Image]()
Make sure to feed your Mezzer a steady diet of chunk!
I figured that I would do my best to consolidate the tech info. Feel free to PM me any specific info and I can add it to this post.
Let's do our best to keep the discussion tech based.
New Owner To-do List:
- Drop lowers and check semi-bath oil level
- Remove and grease main air and IRT pistons (Slickoleum)
- Always fill IRT air first (from empty), to ensure the IRT piston is fully extended
- When filling main air make sure to thread pump on until it stops. This is crucial to ensure the negative chamber is filled. With the pump still connected, you should be able to fully compress the fork without too much effort.
User Setups and Pressure Calculator:
https://docs.google.com/spreadsheets/d/1KPnh-oYncla19GutzWF5NkgZRzZCsmjhLGlpCLnO0eU/edit?usp=sharing
- First tab lists out user setups and comments
- Second tab has calculators for main and IRT air pressures (I recommend using the CCS86 calculator)
Official Guides:
- Service: https://hayesbicycle.zendesk.com/hc...m/hc/en-us/article_attachments/360102677333/Mezzer_Pro_Expert_Service_Guide.pdf
- Setup: https://hayesbicycle.zendesk.com/hc...ndesk.com/hc/en-us/article_attachments/360056778633/Mezzer_Pro_Set-up_Guide.pdf
Replacement Parts:
- SKF green seals MTB37MU
- Air Piston: 215 quad ring (undersized mod 214: Amazon Link)
- Air Shaft: -110 o-ring
- IRT Piston: 122 o-ring
- IRT Shaft: -110 o-ring
Dougal's 1-page general purpose setup guide:
IRT Setup Guides (Not Mezzer Specific):
- https://hayesbicycle.zendesk.com/hc...endesk.com/hc/en-us/article_attachments/360056777993/Mattoc_IRT_Setup_Guide.pdf
- https://hayesbicycle.zendesk.com/hc...ndesk.com/hc/en-us/article_attachments/360055897974/IVA_and_IRT_Trail_Guide.pdf
Damper Tuning:
- I would recommend starting with damping adjusters wide open, or close to it, and adding damping in as needed
- MY21 forks reportedly have a lighter rebound tune
- Compression stack:
- 8 x 17.5 x 0.1 ←[Dougal replaced with a 12mm, others remove it completely]
- 8 x 17.5 x 0.1
- 8 x 20 x 0.1
- Rebound stack:
- Piston
- 13 x 6 x 0.1
- 9 x 6 x 0.1
- 13 x 6 x 0.1
- 13 x 6 x 0.1 ← Remove for MY21 tune
- 8.5 x 6 x 0.2
- 8.5 x 6 x 0.2
- 12 x 6 x 1.0
jmvar's Tear-down Guide for Compression Shim Removal:
Service info from Dougal:
- At 25/75/125/175 hours add 7cc bath oil to the lower legs
- At 50/100/150 hours do a full lower leg oil change (15cc) and air spring clean/lube
- At 200 hours do a full service (seals, foam rings, air-seals, damper oil etc).
Stated another way:
- 25hr Bath oil top-up 7cc
- 50hr Lower Leg clean and relube with 15cc
- 75hr Bath oil top-up 7cc
- 100hr Lower Leg and Air Spring clean and relube 15cc
- 125hr Bath oil top-up 7cc
- 150hr Lower Leg and Air Spring clean and relube 15cc
- 175hr Bath oil top-up 7cc
- 200hr Full service with oil change, wiper seal & air seal change.
- Go to the top and repeat.
Other Modifications:- In warmer climates, you can downsize the air spring quad-ring for less friction (size 214): Amazon Link
- I found that on my fork, the ideal lower leg spacing was spot on for a 110mm hub after I removed the paint from the hub interface surfaces on the lowers. The paint is built up fairly thick here and this causes the lowers to splay a little too much. I made a 3D printed tool to carefully sand this paint down while preserving the flatness of the interface surface (and perpendicularity to the axle), which is very important to having a stiff fork assembly. PM me about the tool, maybe use a chemical to peel the paint, but use extreme caution here. [Edit: I have decked 3 other Mezzers and found that they needed a little correction to the metal as well, not just paint removal]
Before/After:
- I like to put bottom-out indicators on my suspension. Label tape works really well, but plenty of other tapes could work too. Basically, you just air the fork down or leave the pump connected to the main air fitting and bounce the fork firmly to bottom-out. Then place your piece of tape so that it lines up with the top of your o-ring. Being able to accurately see how far you are from true bottom out is crucial to getting the IRT pressure dialed in. The diagonal shape of the crown to stanchion connection makes it impossible to accurately guess without a marker:
Cutaway View:
Make sure to feed your Mezzer a steady diet of chunk!
