RD-631 Aluminum Top Shaft for Yokomo RD SD MD Series  [RD-631]

Yokomo RD-631 jp
Price:
£11.60
Brand:
Yokomo
Model:
RD-631
GTIN:
639342231065
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Aluminum top shaft designed for RD SD MD series

This aluminum top shaft is an RC-scale replacement part designed for Yokomo RD, SD, and MD series drivetrains. It is compatible with the conventional Y2-631 top shaft and includes a wider D-cut to accept lightweight spur gear hubs such as RD-630BK, RD-630BL, RD-630P, and RD-630R.

Install the RD-631 when a durable aluminum option is needed to maintain hub compatibility during tuning and setup. The component is intended for direct shaft replacement and does not alter the drivetrain architecture.

Specifications

  • Item: Aluminum top shaft
  • Material: Aluminum
  • Model Number: RD-631
  • Compatibility: Compatible with RD, SD and MD series top shafts, fits conventional top shaft Y2-631, wider D-cut to accept RD-630BK RD-630BL RD-630P RD-630R lightweight spur gear hubs, supports listed chassis models

Compatible Models

  • MDR-010
  • MDR-010A
  • MDR-010LTS
  • MDR-020
  • MDR-020CE
  • MDR-030
  • RDR-010
  • RDR-010-1
  • RDR-010G
  • RDR-010G2
  • RDR-010G2-1
  • RDR-020
  • SDR-010
  • SDR-010LTS
  • SDR-020
  • SDR-030
  • DP-RS13SP
  • DP-FCBN

Opt for the RD-631 when precise aluminum machining and increased D-cut clearance are required to fit lightweight spur hubs during drivetrain calibration.
Remark :
Due to limited stock availability, please notice that some Yokomo items may have to order from the factory and the ready time is around 4-6 weeks. Customer purchases the item is assumed to accept the waiting time which allows us to order directly from the manufacturer if the item is out of our warehouse.

Does the RD-631 preserve original shaft dimensions for easy replacement?

Yes. The RD-631 is produced to match the conventional Y2-631 dimensions so it can be swapped in without altering chassis geometry.

Which lightweight hubs are confirmed to fit this shaft?

Confirmed fitment includes RD-630BK, RD-630BL, RD-630P and RD-630R, thanks to the widened D-cut on the RD-631.

What maintenance should I perform after installing this shaft?

Inspect hub seating and fasteners after initial runs, and include the shaft in routine drivetrain checks; no special maintenance beyond standard care is required.

Are the listed chassis models the only platforms supported?

The Compatible Models list specifies known supported MDR, RDR and SDR variants plus DP-RS13SP and DP-FCBN; confirm fitment against your chassis before purchase.

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