Fourteen Calculated VSR M4 Mini Cranks, resembling precision-crafted black metal parts from a Santa Cruz factory, are arranged diagonally on a white background.

The Calculated VSR M4 Mini Cranks are two blue metal crank arms made from 7075 aluminum for BMX racing, with drilled holes and threaded ends. Displayed side by side on a white background, they showcase the precision and quality of Santa Cruz factory craftsmanship.

Description

Calculated Racing comes straight out of the heartland of BMX, California, and they produce these cranks in-house at their Santa Cruz factory where they have tight control over both design and quality. These guys are a passionate team that love BMX racing and it shows in their products like these Calculated VSR M4 Mini Cranks.

CNC'd machined out of 7075 aluminium, these cranks are manufactured in all sizes from 100mm right through to 160mm in 5mm increments.

One thing to note here is that these cranks are sold without a spider so that you can have a choice of bolt pattern of either 104bcd (to fit 4 bolt chainrings) or 110bcd (to fit 5 bolt chainrings). PLUS, there's a choice of a Micro or a Mini version of each spider, so you can save even more weight should you choose.

These lightweight crank arms allow you to really dial in the right sized cranks for your young rider. Utilising a square tapered bottom bracket design, you can bolt these straight up to your current race bike, though this company does recommend a 108mm wide bottom bracket spindle due to the design of the arm.

Features

Made in Santa Cruz. Calculated produce these in-house at their California factory, keeping tight control over both design and quality.
Square taper fitment. They bolt straight onto your current race bike, though Calculated recommend a 108mm or wider bottom bracket spindle for the arm shape.
Sized 100mm to 160mm. Every length in 5mm increments, so you can dial in the right crank for a young rider as they grow.
Choose your own spider. Sold without a spider, so you can pick 104bcd for four bolt chainrings or 110bcd for five bolt, in Micro or Mini.
43 kg rider limit. CNC machined 7075 aluminium arms built for mini racers, with a stated rider weight limit of 43 kg (95 lbs).

Specifications

Fits: Square taper bottom bracket, 108mm or wider spindle recommended
Arm length: 100mm to 160mm in 5mm increments
Spindle: Square taper
Bolt pattern: 104bcd or 110bcd spiders, Micro or Mini, sold separately
Material: CNC machined 7075 aluminium
Note: Sold without a spider. Rider weight limit 43 kg (95 lbs). Compatible with Answer style square spiders and sprockets.