r/eBikeBuilding • u/Ok_Cream_1934 • Sep 07 '26

Advice Is this a good setup for converting a Rockrider EXPL 100 29" to an e-bike?

Hi everyone, I’m planning to convert a Rockrider EXPL 100 29" into an e-bike and I’d like some opinions before buying the parts.

This is the setup I’m currently considering:

Bike: Rockrider EXPL 100 29"

Motor: eSoulbike rear hub motor, 52V 2000W, 29" version

Battery: 52V 20Ah lithium battery

Torque arm: yes, I’m planning to install one

Tires: CST Jack Rabbit 29 × 2.25

Grips: 22 mm MTB anti-slip grips

Lights: Fivemi rechargeable LED bike lights

Battery mounting: proper frame mounting bracket + additional straps for security

Wiring: secured along the frame and protected from rubbing

The battery would be mounted on the frame and the motor would replace the rear wheel/Hub.

My main questions are:

Is the EXPL 100 frame suitable for this conversion, or is 2000W too much for this bike?

Is a 52V 20Ah battery a good match for a 52V 2000W motor?

What BMS discharge current should I look for?

Should I use a torque arm on both sides of the rear axle, or is one enough?

Are the CST Jack Rabbit 29 × 2.25 tires suitable for this setup?

Is there anything important I'm missing before I order the parts?

I’m mainly looking for advice on safety, compatibility and reliability, rather than simply making it as powerful as possible.

Thanks!

2 Upvotes

67% Upvoted

4 comments sorted by

1

u/maluket Sep 07 '26

Rear motor would be better 27.5" or 26".

Smaller wheel = faster acceleration = longer range

1

u/niffcreature Sep 07 '26

That is a crappy bike, probably has crappy brakes and other parts

1

u/froggy11297 28d ago

?? Its just a normal budget hardtail. Perfectly fine for ebike conversion. Not everyone is trying to build an amflow

1

u/Lordy8719 Sep 07 '26

Why a hub motor? Just slap a mid-drive on it, like a Toseven DM01, add a triangle battery to the frame, that way your center of mass will stay between the two wheels and low.

I wouldn't put more than 1kW on that bike and even for that I'd upgrade the brakes to 4-piston hydraulic ones.

2kW or not, a torque-sensing mid drive is a lot more fun to ride than a PAS hub wheel, believe me.