Looking for suspension specs to set SAG on 2018 MXR - have a Motool sag adjustment tool


EDR1

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Would be nice to know the optimum static & rider sag for both forks and shock. Did not see it in the Alta user manual or in this forum.
 

Philip

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This forum's software is amazing. You go to Seach - Advanced Search, and then search for "rear sag" in the Suspension sub-forum.

I like 90 mm.

DatePost IDThread titleRepliesForumThread starter
Jun 9, 202231932Alta MX Cone Valve / Trax Suspension Swap30Suspension#76
Jun 8, 202231929Alta MX Cone Valve / Trax Suspension Swap30Suspension#76
Sep 5, 202024341Compression and Rebound6SuspensionOded
Mar 21, 201913235Want to setup the bike for my weight.7SuspensionGeci
Jan 27, 201910921Can you adjust the steering head angle and offset31SuspensionVINSANITY
Jan 26, 201910898Can you adjust the steering head angle and offset31SuspensionVINSANITY
Jan 26, 201910895MXR Rear Shock v.1 vs. v.28SuspensionTCMB371
Jan 23, 201910794MXR Rear Shock v.1 vs. v.28SuspensionTCMB371
Jan 22, 201910788MXR Rear Shock v.1 vs. v.28SuspensionTCMB371
Oct 17, 20186458Rear spring16SuspensionPavetim
Oct 16, 20186422Rear spring16SuspensionPavetim
Jul 5, 20183013How often to check the WP AER48 fork air pressure?13SuspensionPhilip
Jul 4, 20183001How often to check the WP AER48 fork air pressure?13SuspensionPhilip
Jul 4, 20183000How often to check the WP AER48 fork air pressure?13SuspensionPhilip
May 8, 20181156Is the Redshift MX suspension worth re-valving?13SuspensionJosh402
Dec 28, 201713Re-springing a 2017 Alta Redshift MX (and then revalving too)44SuspensionPhilip
 
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Reactions: #76

EDR1

Member
Likes
9
Location
San Francisco
This forum's software is amazing. You go to Seach - Advanced Search, and then search for "rear sag" in the Suspension sub-forum.

I like 90 mm.

DatePost IDThread titleRepliesForumThread starter
Jun 9, 202231932Alta MX Cone Valve / Trax Suspension Swap30Suspension#76
Jun 8, 202231929Alta MX Cone Valve / Trax Suspension Swap30Suspension#76
Sep 5, 202024341Compression and Rebound6SuspensionOded
Mar 21, 201913235Want to setup the bike for my weight.7SuspensionGeci
Jan 27, 201910921Can you adjust the steering head angle and offset31SuspensionVINSANITY
Jan 26, 201910898Can you adjust the steering head angle and offset31SuspensionVINSANITY
Jan 26, 201910895MXR Rear Shock v.1 vs. v.28SuspensionTCMB371
Jan 23, 201910794MXR Rear Shock v.1 vs. v.28SuspensionTCMB371
Jan 22, 201910788MXR Rear Shock v.1 vs. v.28SuspensionTCMB371
Oct 17, 20186458Rear spring16SuspensionPavetim
Oct 16, 20186422Rear spring16SuspensionPavetim
Jul 5, 20183013How often to check the WP AER48 fork air pressure?13SuspensionPhilip
Jul 4, 20183001How often to check the WP AER48 fork air pressure?13SuspensionPhilip
Jul 4, 20183000How often to check the WP AER48 fork air pressure?13SuspensionPhilip
May 8, 20181156Is the Redshift MX suspension worth re-valving?13SuspensionJosh402
Dec 28, 201713Re-springing a 2017 Alta Redshift MX (and then revalving too)44SuspensionPhilip
Thanks Phillip! I tried entering the keyword “sag” into the general (not advanced) search which didn’t produce a result. Advanced search works.
 

Philip

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Location
Lake Havasu City, AZ
Wow, a 2" drop and a 23% softer spring. That's a huge change. You shouldn't use the sag numbers that we recommend, you have a completely different geometry. How does the bike feel to you?
 

EDR1

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9
Location
San Francisco
Never mind! - found the original spring (bought the bike used and it came with a 42-260. Now I have a 48-254 - so it makes a lot more sense.
1/4" shorter spring...what is the ride height multiplier caused by the linkages?
To me the bike feels great - he fixed the extremely stiff front and the overly soft rear and lowered it 2"
 

Philip

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Staff member
Likes
4,070
Location
Lake Havasu City, AZ
Try 90mm race sag, check if you have any static sag, and see how it feels at the track.

You might have to go to 105mm if you do not have any static sag.
 

EDR1

Member
Likes
9
Location
San Francisco
Try 90mm race sag, check if you have any static sag, and see how it feels at the track.

You might have to go to 105mm if you do not have any static sag.
Per the user manual: (measuring from the button on axle top the rear tip of number plate) 534mm unloaded & 504mm static or 30 mm static sag. ( (Will throw all my gear on the bike and take the race sag and post that here.) Would you have a recommendation for using the Motool since it attaches to the axle center and not the button at the top of the swing arm? (since the axle is closer to the swing arm pivot point than the button, it seems that I can expect a different result)
 

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