Sugino RD2 Messenger Crankset, 46T, 1/8", 165mm, Silver

Coming from legendary Japanese manufacturer Sugino, the RD2 Messenger is their mid-level track crankset with a 46t 1/8" chainring.

Size chart

5'4 - 5'7 49CM 30.2IN
5'7 - 5'10 52CM 31.3IN
5'10 - 6'1 55CM 32.5IN
6'1 - 6'3 58CM 33.6IN
6'3 - 6'6 60CM 34.8IN


The RD2 Messenger is a good mid-level track crankset that fits most frames, including conversions (with wider bottom bracket spindles).

The RD2 is actually the Sugino road double crankset converted to single speed/fixed gear use (thus the "RD", 130 BCD and wider chainline/Q-factor), however that doesn't mean it's not a great option.

Cold forged alloy arms and a stiff disc-like aluminum chain ring will work for most riders - especially those not needing or wanting to upgrade to the pricier track-specific 75. 

  • Chainring BCD: 130
  • Chainring Teeth: 46T
  • Drivetrain Speeds: Single Speed 1/8"
  • Spindle Interface Type: Square Taper JIS
  • Bottom bracket length: 103mm
  • Weight: ~565g
  • Chainline : 45mm 

This crankset takes a JIS square taper 103mm bottom bracket, which is not included. However, you can add the Sugino BB3 (but don't use the incompatible Sugino 75 BB) or a Tange bottom bracket as options. For conversions, you can also get a longer BB spindle for clearance. 

The RD2 and the RD2 Messenger differ by their chain ring. The Messenger has a 165mm crank arms and has a stiffer 1/8" 46T disc-type chainring (which also makes it more expensive) while the RD2 has a 165mm or 170m crankarm and the 3/32" 48T classic style chainring.

Recommended Tools:

Install: 8mm axle wrench.

Removal: 8mm allen wrench and Park Tool Crank Puller CCP-22.