I'll be honest with you: I didn't plan on upgrading the motor. I had just finished the 72V battery swap, the bike was ripping, and my wife was already giving me the look that meant "please stop buying things for the Sur Ron." But then I rode someone else's eRide Pro build at McCain Valley and pulled over immediately because I needed a minute to think about my life choices.
That was six months ago. I now ride the Sur Ron Light Bee with the eRide Pro SS 2.0 motor and I will never go back. Here's everything I learned, what I got wrong, and why this upgrade hits different than anything else I've done to this bike.
What the eRide Pro Upgrade Actually Does
The eRide Pro SS 2.0 is a direct-drive hub motor designed specifically for the Sur Ron platform. Where the stock motor is a mid-drive that runs through the stock drivetrain, the eRide Pro is a completely different approach — more torque at lower RPMs, smoother power delivery through the whole range, and a motor that's genuinely built for serious off-road use rather than urban commuting with some trail capability bolted on.
The difference in feel is immediate and it's not subtle. The stock Sur Ron motor has a characteristic surge — it builds, hits a band where it pulls hard, then kind of levels off. The eRide Pro delivers torque in a way that feels more linear and more aggressive at the same time. From a dead stop on a steep hill, you're not hunting for the power band. It's just there.
Paired with the 72V battery upgrade, the combination is genuinely transformed. The battery gives you more voltage headroom and better sustained performance under load. The eRide Pro motor takes full advantage of it. Together they're not a modified Sur Ron anymore — they're a different bike that happens to look like one.
Top speed on flat hardpack goes up meaningfully. But the bigger change is technical terrain: slow-speed rock crawls, steep loose climbs, tight switchbacks where you're at walking pace and need instant torque response. That's where the eRide Pro earns its price.
The Install and What to Expect
This is not a beginner install. I want to be clear about that because I've seen people go into this expecting it to be like swapping a cassette on a mountain bike. It's not. You're removing the stock motor, modifying or replacing the motor mounts depending on your frame year, running new wiring, and configuring the controller to match the new motor specifications.
The eRide Pro team has solid installation documentation and an active community forum, and I'd recommend reading through their resources before ordering. There's also a strong Facebook group specifically for eRide Pro builds that's worth joining before you start — people there have seen every mistake and most of them will save you a weekend of frustration.
My install took about eight hours spread over two days. Some of that was deliberate slowness because I was documenting everything as I went. If you're mechanically confident and have done the 72V battery swap already, plan for a solid Saturday. Budget an extra Sunday just in case.
One thing nobody tells you: your existing motor controller may or may not play nicely with the eRide Pro depending on your firmware version and Sur Ron generation. Check compatibility before you pull the trigger on the motor. Some builds need the BAC4000 controller swap at the same time — I did mine together and I'm glad I didn't try to phase it. Read about the BAC4000 swap here if you haven't already.
Real-World Performance at McCain Valley and Beyond
McCain Valley OHV Area is where we do most of our e-moto riding — it's about 90 minutes east of San Diego, has everything from loose sandy washes to tight rocky singletrack, and it's where I've put the most hours on every configuration of this bike. The eRide Pro build handles it differently than anything I've ridden there before.
The rocky technical sections that used to require careful momentum management are now significantly easier. You can go slower with more control because the torque is there when you need it at low speeds. The sandy climbs that used to require momentum and commitment can be ridden more deliberately. The overall experience is less about managing the bike's power delivery and more about actually riding the trail.
Kyler on his Rawrr Mantis Mini still beats me everywhere because nine-year-olds have no fear and weigh nothing. But the gap is smaller now, which is all that matters to my ego.
We've also taken the eRide Pro build to Red-Tailed Roost in Cleveland National Forest and the difference on the sustained climbing sections there is significant. The stock motor would get warm on the longer climbs. The eRide Pro runs cooler under load, which matters more than I expected on multi-hour rides in the San Diego heat.
What We Were Wearing
The day I finished the eRide Pro install and took the bike out for the first real ride, I was wearing our Braap Life McCain Valley Sessions shirt — which felt appropriate because McCain Valley is where I first got the idea that I needed this upgrade, and it's where I keep coming back to validate that it was worth it.
The e-moto designs in our collection come from sessions exactly like this one — wrench on the bike, take it out, find out if it works, repeat until it's right. The Kyler Braap design captures something real about what it means to do this with your kid watching everything you do and then immediately going faster than you anyway.
The trip came first. The shirt came second. Go upgrade something — carefully, with the right documentation, and ideally not while your spouse is watching.