News

Six bolt clamping configuration
Headset pre-load bolt recess (32mm diameter)
6061-T6 aluminum, CNC machined
48mm reach and 33mm rise (-1.5mm when flipped)
10.4 oz (294.8g)

Six bolt clamping configuration
Headset pre-load bolt recess (32mm diameter)
6061-T6 aluminum, CNC machined
48mm reach and 33mm rise (-1.5mm when flipped)
10.4 oz (294.8g)

Proven 41-Thermal® processed 4130 chromoly
Legendary lifetime replacement warranty
New, custom, seamless, tapered, butted and specially formed leg tube shaping for improved grind and guard clearance.
All-new steerer tube design improves fatigue strength and includes a built-in, integrated, lower headset seat race.
New, optimized, 4mm dropout shape for grind and peg clearance.
32mm traditional offset
3/8” axle slots only
Starting at 1lb 15.2oz (885 grams)

36-Hole Spoke Configuration
6061-T6 aluminum hub shell
6902 sealed bearings
Chromoly collars
14mm hollow chromoly female axle
3/8″ 4130 chromoly inbound axle bolts
Steel helicoiled threads
Weight: 10.5oz / 297g

36-hole, 2014-T6 aluminum shell
Available with 14mm or 3/8″ inbound axle
Left or right hand drive (switchable)

The THUNDERBOLT is the new and improved descendent of the Twombolt. It is still one of the most technically advanced crank designs on the market. Due to continued advancements in our legendary 41-Thermal® processing and heat-treatment system, fatigue life has been increased by a massive margin.

Backed by our legendary lifetime warranty.

7075-T6 aluminum
Available in 25t, 27t, 28t, 30t or 31t sizes