Installing a Coil Shock on my Stumpjumper EVO

The Specialized Stumpjumper EVO is an extremely popular mountain bike, and we're consistently helping our customers with upgrades on these bikes. So I (Mike) built up a Stumpy EVO to ride and better assist customers with their questions. Tons of people ask if a coil shock will increase the performance of their bike, so in this 3 part video series we aim to answer the question "Should I put a coil shock on my Stumpjumper EVO?"

In this first part of the series, I install a coil shock on my Stumpy EVO and go through the process of using a spring calculator and sag measurements to find a "starter spring" for this new coil shock setup.

Subscribe so you don't miss out on Part 2 and 3 where I ride it and review how it feels!

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Bellingham, WA // 360-306-8827

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0:00 - Intro

[BengLang]

Nice. When I upgraded my stumpjumper I asked the specialized people if a coil shock would be okay to use. The guy that I spoke to with did not advised to do so because it not really designed to be used with a coil shocks. Also, there are stumpjumper owners that have had shocks that snapped. I think it is just how the suspension lay out is of the stumpjumper. With that I picked a DVO topaz and onyx as an upgrade. 😊 Thanks for this helpful video 😊

[graysonadams]

The strut mount layout is definitely a killer. I was running my air shock at 30% sag (prob too much) on a short travel stumpy and broke the damper shaft on a hard bottom-out.

[Jonofthejungle]

The most interesting thing I noticed when I did this to mine was the added comfort on long rides. It added damping to all the contact points making the bike feel smoother over any surface.

[LackingLoam]

Would be interested to see you throw the cascade link on there and see if you notice the progression / travel increase

[rookieboy]

Great news I am following how this story unfolds.

Worth noticing is the first pictures of 2021 Stumpjumper EVO LTD was with coil. Once ready for production the coil was gone.

[marlborosilver]

Huge fan of your work and didn’t know you own the shop. Just want to congratulate your hard work, and I hope your business rises like foam. You deserve it dude.

[cabrydon]

Early SJ Evo's came with the DHX2 and there were tons of failures. My SJ Evo Pro came with the coil stock, I had 2 rides before mine blew up. Sent it to Fox for warranty service and they advised not to use their coil shocks on this frameset. Replaced with a factory DPX2 at the time and haven't had any issues in the 2 years since and thousands of miles.

[rodrigopages]

at 70-73 kg rider weight 450lbs was spot at 30% for me this shock works AMAZING on this bike!

[logancanann]

God bless you for making this video, just bought a coil shock for my stumpy EVO yesterday and there is little to no information or reviews on yt on this!

[usa__md]

I have been searching for a video on this for so long. I appreciate the upload!

[MichaGajek]

can't wait for the second part :) besides the side-to-side stiffness (or lack of it), what about the progression? I have close to zero knowledge there, but I heard multiple times the stumpy suspension design works better with progressive shocks.

[jaredrude]

I subscribed because your new haircut is pretty good. Also my son and I both love our SJ Evos, they can do pretty much everything as a good compromise.

[womacko]

I can highly recommend the sprindex. It's an adjustable spring, so you can just try different weights. Also you can tune it one fly, mid ride.

[piccolo]

Mike has excellent taste. That bike is spec'd PERFECT.

[nickjones]

You need a Springdex spring to get you dialed in
I like how I can adjust for weight
Like when I’m carrying a Hydro pack just dial it up a few clicks
Easier than an air shock actually no pump to carry!

[michalwiktorow]

Turbo Levo SL Alloy + RockShox SUPER DELUXE ULTIMATE COIL RC2T 210x52, 5 - with HBO. For the exact same reason - Fox Float did not hold up well the side-loads, but this one does (for now), the spring is 600lbs, stroke is exactly 52.5 (as stock Fox Float). Bike 21kg + rider 97kg + backpack 6kg. More flowy trails than jumping - sure - but it seems rigid as f. yet it does take out uwanted bumps well! I am still dialing in all of the settings (pain in the butt). Coil fits near strut arm and leaves 3mm not more.

[sluette]

Really nice video! I'm wondering about the reference list @2:41 as the 2020 Evo TLD Limited was equipped with a FOX DHX2 Performance Elite.

[booger]

RS SDU Coil MY23 needs much softer spring that any calculator suggest. I weight 85kg and I need 350lbs spring to achive 30% sag (measured seatted) at my Transition Spire. Every calculator suggest 450lbs.

[Kirchenschlager]

awesome video. i had a dhx on mine until i was talking with spesh and they told me that shock is a no go... so i got sad and sold it thinking it just wasn't compatable with any coil. but this gets me excited again!

[LPW]

Nice!
Would love to also see a cascade link on this bike😊