Profile Cranks


Profile Racing has been in the bike industry for a quite a while, but is a far more well known as a maker of expensive, well crafted, BMX racing frame and fork sets, cranks and stems. Many of you will remember their still produced Champ Pro frame and fork as one of the finest and most sturdy of your racing childhood. Profile makes these cranks using a CNC milling station. Each arm is cut from single piece of 7075-T6 billet aluminum. The arm is 1" (25.4mm) at the pedal spindle and gradually widens toward the B/B spindle where it is 35.5mm wide. A shallow groove is milled on the back of each arm to reduce unnecessary weight. The pedal spindle hole is drilled and tapped with 9/16" by 20 TPI threads.

The crankarm cap hole is bored and tapped with 22mm x 1mm threads for the dust cap or crank pulling tool. The square tapered hole is milled with tapered sides as a part of the milling of the lower side. These arms are a low profile design, intended to be used with a B/B spindle that 107mm and 113mm in length. For that reason they have a slightly steeper offset in the 7 degree range so they will properly clear the chainstays.

The spider is a great piece of machine work, again milled on all surfaces. The thickness of the aluminum that the inner bolts anchor into is a hefty 8.62mm, while the outer and middle bolt to a 3.5 mm thickness at the spider arm ends. The spider is fastened to the right arm by threading an aluminum collar onto a protrusion on the back. This collar is tightened using a pin spanner. Additionally the spider held by a steel bolt with a 3/16" hex fitting that is bonded in place once properly tightened. These cranks use the standard 110mm bolt pattern for the mid and outer chainring and 74mm for the inner chainring.

We found the Profile Billet cranks had a Bike-Pro Q measurement of 175mm. The Profile arm set comes as right arm with spider, and left arm in five lengths, 170mm, 172.5mm, 175mm, 177.5mm, or 180mm. Chainrings, the fixing bolts and nuts, the inner fixing bolts, and crank arm dust caps will be needed separately. They come anodized in Blue, Black, Green, Lavender or Silver. The weight of a 175mm Profile crank arm set is 410.5 grams. Made in USA, specify length and color.

Size-70-72-75-77-80 - Color-B-BK-GN-L-S  $ Price in Catalog 
Copyrighted material - All rights reserved

This site sponsored by