Mugen Seiki MRX4 Competition Brake Disc MRX4-21/GO by 3Racing  [MRX4-21/GO]

Mugen Seiki MRX4 /Mugen Seiki MRX4-R Brake Disc - 3Racing MRX4-21/GO
Price:
£6.95
Brand:
3Racing
Model:
MRX4-21/GO
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MRX4 Disc Brake Overview

This brake disc is an RC-scale spare intended for Mugen Seiki MRX4 and MRX4-R chassis and is identified by part number MRX4-21/GO. It acts as a direct-fit option to replace or adjust rear braking parts on 1/10 on-road models that use the MRX4 bolt pattern.

Installation notes: check rotor-to-hub runout and secure fasteners to your recommended torque, swapping any worn fixings. Install one disc, verify alignment, then fit the opposite side and confirm free wheel rotation prior to full drivetrain reassembly. Typical MRX4 hand tools will complete the job.

Tuning role: fitting different discs changes brake bite and modulation at the hub, which influences brake bias and diff settings on track. Use matched sets and perform short tests to evaluate stopping distances and corner entry behaviour.

Is this listed for the original MRX4 parts fitment?

Yes, the disc is made to the MRX4 mounting pattern and suits both MRX4 and MRX4-R rear assemblies.

Are specialised workshop tools required?

No. Standard hex drivers and a small torque driver for screws are usually sufficient.

When should I replace both discs together?

For even braking response and consistent balance, replace discs as a matched pair whenever possible.

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