The house shock line · Mechanical Concepts
Rimrock is the basalt ledge that caps the high desert we ride — and the rock that breaks shocks in Southern Oregon. Three tiers, one per level of adjustability. Every set built one at a time by Mike Davis.
The line
Not sizes, not trim levels — the number tells you how far you can tune the shock. Pick by how you ride, then call the shop and we’ll confirm it fits your quad.
Twin-tube. Trail and utility riding — the shock for the rider who wants a real set under the quad without paying for adjusters they’ll never turn.
Piggyback reservoir with compression adjustment. The volume seller — enough tuning range to set the quad up for your weight, your track and your day.
Four-way adjustable. For racers and dune riders who change the setup between motos — and want to be able to put it back exactly where it was.
Specs on this page are held open on purpose. Nothing goes on a RIMROCK spec sheet until Mike has measured it on the bench — travel, adjuster count, spring rates and fitment all come from him, not from a catalog.
Built in Southern Oregon
RIMROCK isn’t a badge we put on somebody else’s shock. It’s designed, machined, assembled and tested here — by the same hands that build custom A-arms, swingarms and chassis for racers who show up at our door.
Bodies and hardware are drawn in-house and cut here, so a change a racer asks for on Friday can be in a shock by the next build.
No production line. Every set is built, charged and checked by hand — and matched to the quad it’s going on.
The high-desert rimrock outside the shop is the proving ground. If it can’t take that ledge, it doesn’t get the name.
Rebuilds, revalves and setup changes come back to the same bench. You’re not shipping a shock to a stranger.
Built to your quad
Every RIMROCK set is built from scratch and fitted to the machine and the rider it’s going under — eye-to-eye length, mount style, spring rate and valving all come off your numbers, not a catalog. That’s why you won’t find a make/model grid on this page. Tell Mike what you ride and how hard, and he builds to it.
How a build starts
Make, model, year, discipline, rider weight and what’s on the quad now.
Usually same day. He’ll ask about arms, travel and where you ride — that’s what sets the length.
Machined, assembled, charged and set to your weight before it ships or goes on the quad here.
Running custom A-arms or a stretched chassis? Say so in the notes — it changes the length before anything else does.
RIMROCK is our own line, built to order for quads. If a factory replacement is the right call instead, we source OEM shocks for the major makes. Bilstein Black Hawk is a separate line we’re an authorized dealer for — UTV only.
