Prevelo Bikes

HEIR Direct Mount Crank

Heir

The HEIR Direct Mount Crank offers direct mount crank versatility and performance, in crank lengths that are optimized for young riders.

Features

  • Stiff and light cold forged design.
  • Compatible with 3-bolt direct mount chain rings.
Length
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Specifications

COMPONENT
WEIGHT
HEIR 120mm Direct Mount Crank 523 grams
HEIR 140mm Direct Mount Crank 535 grams
Chain Ring - 28t 58 grams
Chain Ring - 30t 68 grams
Bottom Bracket 138 grams
DIMENSION
120mm
140mm
Crank Arm Length 120mm 140mm
Q Factor
151mm 170mm
Spindle Diameter 24mm 24mm

Determining Chain Ring Offset:

  • If your bike has 148mm rear spacing (Boost), choose 3mm chain ring offset
  • If your bike has 135mm or 142mm rear spacing, choose 6mm chain ring offset (most kids bikes fall under this category).

Assembly Instructions