An RV and trailer service shop along the Iowa-Illinois corridor called us last year trying to decide between two arm configurations on a car lift Atlas install, and the decision came down to something most brochures never explain well: whether the shop needed even weight distribution or better clearance around wheel wells for brake and rotor work. A year later, after install day, a dozen brake jobs, and a couple of surprises we didn’t fully anticipate, that shop has strong opinions about which arm style actually works for their day-to-day. Here’s what that first year looked like, from the decision to the lift they’re running now.
Browse Atlas two post and heavy-duty lifts built for brake, rotor, and undercarriage work, with install and arm configuration guidance from our Iowa team.
Why This Shop Needed a Different Lift Than Their Neighbors
Most of the general repair shops around this corridor run standard symmetric two-post lifts because they’re doing alignments, tire work, and general maintenance on passenger cars. This shop is different — they service RVs, travel trailers with brakes, and dual-axle trailers that come in with wheel wells and fender skirting that make standard arm placement awkward. They needed a car lift Atlas configuration that could actually get arms and adapters up under a chassis without fighting fender wells or running out of arm reach on a longer wheelbase vehicle.
When we walked the shop before the install, it became clear pretty quickly that a straight off-the-shelf symmetric setup wasn’t going to cut it for every vehicle they service, but going full asymmetric wasn’t a slam dunk either because they still do a fair amount of straight-axle work on smaller trailers and tow vehicles where symmetric loading is actually preferable. That tension is exactly why the arm decision took longer than the rest of the purchase process combined.
Symmetric Arms: What They Gained and What They Gave Up
Symmetric arm configurations center the vehicle evenly over the columns, which is the standard setup most shops picture when they think of a car lift Atlas installation. For straight-axle trailers and smaller tow vehicles, this shop found symmetric arms made loading fast and predictable — the vehicle sits centered, weight is distributed evenly, and there’s less guesswork getting a trailer positioned correctly before raising it.
The tradeoff showed up almost immediately on brake jobs involving larger RVs with rear overhangs. Symmetric arm geometry put the front arms closer to the door area than the shop wanted, and on a couple of early jobs a tech had to reposition the vehicle twice to get workable clearance for pulling a wheel and getting a rotor off cleanly. It wasn’t a dealbreaker, but it was enough friction on a repeat basis that it became the main argument for looking harder at an asymmetric configuration for at least one of their two bays.
Why They Ended Up Going Asymmetric for Their Main Bay
By month three, the shop had enough repetition with both trailer types coming through that the pattern was obvious: asymmetric arms on their main bay gave techs more room to work around wheel wells and rear overhangs without repositioning the vehicle. The front arms swing out further from the door line, which on an RV or trailer with a lower step or skirting made a real difference in how fast a rotor swap actually went.
We ended up installing one asymmetric-arm car lift Atlas unit in the primary bay used for brake and rotor work, and kept a symmetric configuration in the second bay for straight-axle trailer service and general undercarriage inspections. That split setup wasn’t the cheapest path — running two different arm configurations meant slightly different adapter sets and a bit more training for techs to remember which bay does what — but a year in, the shop says it’s paid for itself in reduced job time on the brake-heavy bay alone.
Install Day: What Actually Happened on the Shop Floor
Install day for this shop wasn’t dramatically different from a standard commercial install, but a couple of things stood out. The shop’s floor had some unevenness from age that required extra shimming during anchor placement, which is common in older buildings along this corridor that weren’t originally built with heavy lift equipment in mind. We caught it during the pre-install walkthrough and adjusted anchor depth and floor prep accordingly rather than discovering it after the columns were already up.
The other thing that came up on install day was overhead clearance — this shop’s main bay has a slightly lower roofline than their secondary bay, and running the asymmetric car lift Atlas unit to full height put the overhead beam closer to a support beam than either of us wanted. We adjusted by setting the maximum travel height slightly lower on that unit, which still gave more than enough room for underbody brake and suspension work without risking contact overhead. It’s a good reminder that even a straightforward two-post install benefits from an in-person walkthrough before anything gets bolted down.
The First Real Test: A String of Brake Jobs
The real test came about six weeks after install, when the shop ran a stretch of a dozen brake and rotor jobs across a mix of RVs and trailers. Techs reported that the asymmetric bay cut meaningful time off jobs involving larger units with rear overhangs, mostly because they weren’t repositioning vehicles mid-job to get clearance. The symmetric bay held its own on smaller, straight-axle trailers where even weight distribution mattered more than arm swing clearance.
One thing that surprised the shop was how much lock height flexibility mattered during this stretch. Different trailer heights meant techs were locking the lift at varying positions rather than always running to full height, and the roughly two-to-two-and-a-half-inch increment spacing on the locking mechanism gave them enough granularity to find a comfortable working height for each job instead of being stuck choosing between fully up or fully down. That flexibility turned out to matter more day-to-day than either arm configuration on its own.
What This Shop Would Tell Other Iowa-Illinois Corridor Shops
A year later, the shop’s advice to other RV and trailer operations considering a car lift Atlas purchase is straightforward: don’t assume one arm configuration fits your whole mix of vehicles, and don’t skip the in-person walkthrough before install. If your shop services a genuinely mixed fleet — straight-axle trailers alongside larger RVs with overhangs and skirting — a split configuration across bays might cost a little more upfront but save real time on the jobs that actually pay the bills.
We’ve used this shop’s experience as a reference point with other trailer and RV service operations we’ve since quoted along the corridor, because it’s a clean example of how arm geometry decisions aren’t cosmetic — they show up directly in job time once the lift is actually in daily use. If you’re weighing the same decision, we’re glad to walk your bay in person and talk through what your actual vehicle mix needs before you commit to one configuration.
Our Clients Include: