Read through these instructions and contact Rad Power Bikes Product Support if you have questions. If you are not confident in your ability to successfully and safely perform all steps, we recommend having the work performed by a local, certified, and reputable bike mechanic.
The rear wheel removal process is very similar on both the RadRover and Radmini.
1. Gather tools you will need:
- A strong friend
- Blocks about 2" high
- 4 mm Allen wrench
- 18 mm wrench
- 10 mm wrench
- Flat side cutters
- Philips head screwdriver
- A torque wrench
- Replacement zip ties
2. Shift the bike into gear 7, to move the chain to the smallest cog, which will make several steps in the rear wheel removal and reinstallation process easier.
3. Power off the bike. Ensure the bike is in the off position and use the key to remove the battery. Once removed, press and hold the “MODE” button on the LCD Display Remote until the display remains off for about two seconds (it may flash on briefly). This ensures the power is fully discharged from the bike and it is safe to work on.
4. Turn the bike upside down. Set up blocks as wide as the handle bar grips. Have a strong friend help you flip the bike upside down and rest the grips on the blocks to prevent damage to the controls and LCD display.
3. Remove the bash guard. Use a 4 mm Allen wrench to remove the two bolts holding the derailleur bashguard and set aside.
4. Remove the torque arm bolt. Locate the torque arm bolt on the brake disc side of the wheel. The bolt head will vary depending on the bike model/year, so select the appropriate tool, either a Phillips head screwdriver (for the 2018 RadRover), or a 4 mm Allen wrench (2018 RadMini, 2019 RadRover and Radmini), remove the torque arm bolt, and set it aside.
2018 RadRover 2019 RadMini
5. Loosen the axle nuts. Use an 18 mm wrench to loosen the axle nuts enough to allow the rear wheel assembly to be lifted out of the rear dropouts, but keep the nuts and hardware installed as the orientation of this hardware must remain the same.
6. Unplug the motor connector. Locate the motor connection on the derailleur side of the bike. Use flat side cutters to snip the zip tie holding the motor connector cable to the frame taking care to not damage to the cable housing or wires. Pull the connector directly apart without twisting to unplug.
7. Remove the rear wheel. Note or take a picture of the orientation of the washers on the motor axle for reinstallation. Move the derailleur out of the way by pulling the derailleur body up and towards the back of the bike. Using the other hand, lift the rear wheel assembly out of the dropouts using caution to not touch the metal brake disc.
Note: if the wheel is difficult to remove, loosen the axle nuts a bit more and have a friend stabilize the bike then rock the wheel side to side to dislodge one side of the axle from the dropouts at a time.
8. Perform necessary maintenance. Once the rear wheel is removed, change the tube/tire, swap in a new wheel, etc.
9. Install the rear wheel. Check the motor washers are in their original orientation. Hold the derailleur out of the way and align the smallest cog with the chain.
Carefully lower the wheel assembly so the smallest cog is seated in the chain, the brake disc slides in between the brake pads in the brake caliper (1, below), the torque washers are in their original and proper orientation (2, below), and the axle is fully seated in the dropouts.
To troubleshoot an unseated axle: If there is a gap between the axle and the dropout, use a 10 mm wrench to carefully turn the axle to align its flat sides with the sides of the dropouts and allow the axle to seat fully using caution to not strip or damage the axle threads.
10. Install the torque arm bolt. On the brake disc side, thread the torque arm bolt through the torque arm and into the mounting point on the dropout. Use a 4 mm Allen wrench (or Phillips head screwdriver, depending on model/year) and torque to 5 Nm.
11. Tighten the axle nuts. To properly tighten the axle nuts, first hand tighten the axle nut on the brake disc side, then ensure the derailleur side of the axle is fully seated in the dropout. Use an 18 mm torque wrench to torque both axle nuts to 40 Nm.
Ensure that the axle nuts are tightened down to 40 Newton Meters (Nm). This should be done with a torque wrench, as improperly torquing the axle nuts could allow the rear wheel to come loose while riding. If you have any questions regarding this step, please contact Rad Power Bikes Product Support.
12. Plug in the motor connector. Reconnect the motor connector by aligning the internal pins and external arrows and pressing the two sides directly together without twisting.
13. Zip tie the motor connector cable to the cable guide on the chainstay. Use flat side cutters to trim the excess zip tie.
14. Reinstall the derailleur bashguard. Place the bashguard in position, ensuring the tail light cable runs outside of the bashguard (for 2019 models only). Pass one bolt through the washer, into the bash guard mounting point, and thread the bolt into the mounting point on the dropout. Repeat with the other bolt and use a 4 mm Allen wrench to tighten both bolts securely.
15. Reinstall the battery, test the bike fully, and have your work inspected by a certified, reputable bike mechanic.
If you have any trouble getting the wheel back into the bike completely, or if you have questions about specific parts of the process, contact Rad Power Bikes Product Support by email to email@example.com or by phone to (800) 939-0310 x 2.