Torp TC1000 + TM25 on a 72v Surron: The Upgrade That Makes Power Feel Usable
April 30, 2025
If you’ve spent any time around Surrons, you already know the trap: it’s easy to add power on paper, but it’s hard to make that power feel clean, controllable, and repeatable in the real world.
That’s why I was genuinely excited to bolt on Torp’s TC1000 controller and TM25 motor to a 72v Surron setup and see if it delivers something more than just big numbers. After installing it, calibrating it, and then riding it the way I actually ride (slow-speed control, wheelies, quick hits of throttle, hill pulls, and a couple spicy speed runs), I walked away impressed by one thing above everything else:
This combo makes the bike feel like it’s working with you instead of fighting you.
Installation: straightforward, especially if you’re already on Torp
Coming from a Torp TC500 setup, the swap to the TC1000 was refreshingly painless. The connections stayed familiar, and the whole “plug-and-play” vibe is real. Compared to some other aftermarket controller installs I’ve dealt with (where you’re basically playing wire-Tetris and praying nothing gets pinched), Torp’s harness approach is clean.
The TC1000 physically mounts a bit differently than the TC500 (it sits higher), but it didn’t turn into a headache.
For the TM25 motor install, the biggest “first impression” is that it’s clearly a more serious piece of hardware than stock. It’s wider and it’s heavier. Torp also does a nice job protecting the phase wire areas where things typically get stressed.
If you’re starting from a completely stock bike or a different controller ecosystem, plan for a more involved job. The TC500-to-TC1000 path is the easy lane.
The Torp display: I actually wanted this
I’ve run phone-only setups before, and it works, but it’s annoying when you just want quick info without mounting/charging a phone or messing with apps mid-ride.
The center-mounted Torp display ended up being a legit quality-of-life upgrade for me. Once it’s set correctly in the app (important detail below), mode changes and basic ride data are just there when I need them.
One key setup note: if you’re using the Torp display, you have to set the mode button to the Torp display inside the peripherals settings. If you don’t, you can end up stuck in eco mode and wonder why your bike suddenly feels “broken.”
Calibration and tuning: the Torp app keeps it approachable
Calibration is one of those things that can feel intimidating until you’ve done it a couple times. With the Torp app, the process stayed pretty guided:
Set your battery type correctly (I ran a 72v aftermarket battery)
Select the correct motor (TM25 in my case)
Calibrate with the wheel off the ground
Calibrate throttle
Confirm wheel direction
From there, it’s all about shaping the ride: eco vs sport behavior, throttle feel, and how you want power delivered.
I personally leaned toward a throttle response that feels close to stock (not twitchy), then added a little extra in the midrange on sport. The result: the bike stayed predictable, but still hit hard when I asked it to.
I also set up reverse (holding the negative button) which is one of those features you don’t think you need… until you’re stuck in a weird spot and suddenly you really need it.
One hiccup I ran into: getting the thumb regen control to read properly wasn’t seamless in my case. I installed the hardware, but calibration wasn’t cooperating, so I moved on and focused on ride testing.
First rides: smoother than it has any right to be
I started in a more conservative tune and went straight into slow-speed control and wheelie-style riding. What stood out immediately wasn’t “more power.” It was how easy the power was to place.
The best way I can describe the TM25 + TC1000 together is buttery. The bike responds cleanly and predictably, and that matters way more than a spec sheet when you’re trying to hold a line, balance a wheelie, or creep through technical low-speed stuff.
Even at lower kW settings, it didn’t feel “soft.” It felt efficient. Like the motor wasn’t straining.
Weight changes the bike (and you feel it)
This particular setup was paired with a larger 72v battery, and I could feel the added mass right away. The bike became noticeably heavier, and that affects everything:
Slow-speed balance takes more input
The suspension can feel undersprung if it was already close to the edge
Moving the bike around (garage/shed life) is more work
But here’s the twist: that extra weight made me appreciate the smoothness and controllability even more. When the bike’s heavier, you don’t want snappy, unpredictable power. You want torque you can manage. This combo delivered that.
Eco mode that still rips
I took it up a hill in eco and it still felt punchy. Acceleration was the kind of “wait… this is eco?” moment that makes you laugh inside your helmet.
What I liked most was the low-end feel: enough to bring the front up and get playful, but not so violent that it instantly turns into a loop-out situation.
Turning it up: speed runs and reality checks
After the initial riding, I changed settings to chase top speed.
I increased field weakening for more speed, maxed current limits for the run, and did a couple pulls. The bike got into “this is ridiculous” territory fast.
A full-throttle launch at these power levels isn’t something you casually do on a short stock-ish setup. If you try to launch like a maniac, the bike will remind you who’s in charge. Hard.
On a later pull, I popped the breaker. That’s not me complaining—that’s confirmation the system is actually pushing.
I also kept an eye on temps while doing it, and nothing went into panic territory during the testing I did.
Battery pairing: Powerful Lithium 72v R-Spec Elite Pro
This build was paired with a Powerful Lithium 72v 50ah R-Spec Elite Pro battery, and it felt like a proper match for the TC1000/TM25.
Even during the harder runs, I didn’t feel the bike “lay down” or sag in a way that ruins the fun. The battery felt solid and composed under load.
I ran on a single discharge port for the testing and didn’t sit pinned forever, but for the kind of riding I did, it held up confidently.
What We Like
Very smooth, controllable power delivery (especially at real-world riding speeds)
Clean install experience and tidy harness setup (particularly if you’re already on Torp)
App calibration and tuning process is approachable
Display is genuinely useful day-to-day (battery %, mode, speed, efficiency data)
The bike feels less like it’s “struggling,” even at lower power settings
Things To Consider
The TM25 motor is heavier than stock, and the bike can feel noticeably heavier depending on your battery setup
If you’re coming from stock or a different controller ecosystem, installation will likely take longer
High-power tuning quickly enters “loop-out” territory without the right setup and restraint
Regen/thumb brake calibration may take extra fiddling (it wasn’t plug-and-perfect in my case)
Final Thoughts
The Torp TC1000 and TM25 combo didn’t just make the bike faster. It made the power feel usable.
For me, that’s the difference between a mod you show off once and a mod you actually want to live with. The bike felt smoother, more cooperative, and more confidence-inspiring—especially in the exact riding scenarios where jerky power delivery usually ruins the experience.
If you’re building a 72v Surron and you care as much about control and feel as you do about speed, this pairing belongs on your shortlist.
Links
Torp Motors (promo code RunPlayBack5): https://webshop.torpmotors.com/
Powerful Lithium 72v 50ah R-Spec Elite Pro Battery (promo code RUNPLAYBACK): https://powerfullithium.com/products/rspecelitepro?ref=RUNPLAYBACK
Powerful Lithium Elite Charger (promo code RUNPLAYBACK): https://powerfullithium.com/products/powerful-lithium-elite-charger?ref=RUNPLAYBACK
RFLOXA Hawk31 Pro (promo code RUNPLAYBACK): https://www.rflo-xa.com?aff=11
Fork Star Nut Installer: https://amzn.to/4eh1tv8
Bell Super 3R MIPS Bike Helmet: https://amzn.to/3TJ1vTR
Fox Racing Bike Gloves: https://amzn.to/40P5SyQ
Fox Racing Hip Bag: https://amzn.to/3xmW4mT
Hafny Handlebar Bike Mirror: https://amzn.to/3FVubmN
Veeape Electric Air Pump: https://amzn.to/3LPLTf9
Denlix Military Sling Bag: https://amzn.to/3LTKN2c
Lamicall Bike Phone Mount: https://amzn.to/3LXmD6O
Onvian Wireless Bike Alarm: https://amzn.to/42KUgyE
RunPlayBack Merch: http://shop.runplayback.com/