Thunder Bolt-On Replacement 12mm Thru-Axles

We bill these as 12mm thru axles for fat bikes, but you can get them for any type of bike! Are you the kind of rider that is more likely to be heard long before your are seen coming down a trail? You (and me) are why we build our Thunder Bolt-on axles. For the Clydesdale, the rider “lacking finesse” or those that just seem to somehow manage to break everything. The Thunder Bolt-on axle is solid aluminum resulting in the strongest thru-axles on the market.

  • Designed for big rides and big riders.
  • Available for all 12mm thru-axle hub “standards”, including fat bikes.
  • Machined to the tightest standards in the industry.
  • Designed, built and quality tested in the USA. Proven around the world.
  • Available for rear wheel use only. Not designed to attach Trailers or Trainers.
replacement-axle
Thread PitchLength of Axle ShaftApplicationPart Number
1.5 mm165 mm12mm Bolt-onBOL 212
1.75 mm167 mm12mm Bolt-onBOL 221
1.75 mm174 mm12mm Bolt-onBOL 201
1.75 mm180 mm12mm Bolt-onBOL 211
1.75 mm192 mm12mm Bolt-onBOL 202
1.75 mm198 mm12mm Bolt-onBOL 210
1.75 mm209 mm12mm Bolt-onBOL 209
1.75 mm229 mm12mm Bolt-onBOL 207