What Axle Do I Need? | The Robert Axle Project

The best way to find the axle for your bike is to input your information into our Fitment Selector here:

If our Fitment Selector did not list your bike, watch our YouTube video or follow these steps below:

#1. Determine the length and thread pitch of your stock axle.

Most axles now come with the length (L) and thread pitch (TP) measurements printed on the axle. But don’t trust them, several companies are printing misleading information on the axle. Remove the axle from your bike and double check the dimensions.

Maxle-dimensions

#2. Measure your axle.

No special tools required. Print our Fitment Guide (print actual size). Measure the straight length of your axle shaft. Do not include the axle head or tapered spacer, if there is one.

Axle length is not the same as hub length. A bike with a 12×142 hub standard will have a significantly longer axle.

Fitment Guide for 8.5 x 11 inch

Fitment Guide for Metric A4 paper

#3. Place your axle on the Fitment Guide to determine your axle’s length and thread pitch.

Thread pitch must match exactly. Determine if it is a 1.0, 1.5, or 1.75 thread pitch.

thread-pitch

#4. Select the tab below and search for the correct dimensions of your stock axle.

Kid Trailer

#5. Select the Kid Trailer Axle that fits your bike.

Thread Pitch

Length of Axle Shaft

Application

Part Number

1.0 mm

152 to 167 mm

Kid Trailer

KID217

1.0 mm

160, 167 or 172 mm

Kid Trailer

KID213

1.0 mm

175 or 181 mm

Kid Trailer

KID216

1.0 mm

214 or 229 mm

Kid Trailer

KID215

1.5 mm

159 or 165 mm

Kid Trailer

KID212

1.5 mm

172 or 178 mm

Kid Trailer

KID214

1.5 mm

182 or 188 mm

Kid Trailer

KID222

1.5 mm

209 mm

Kid Trailer

KID206

1.5 mm

229 mm

Kid Trailer

KID208

1.75 mm

167 mm

Kid Trailer

KID221

1.75 mm

174 or 180 mm

Kid Trailer

KID211

1.75 mm

192 or 198 mm

Kid Trailer

KID210

1.75 mm

209 mm

Kid Trailer

KID209

1.75 mm

217 to 229 mm

Kid Trailer

KID207

All axles are compatible +/- 2 mm in length.

BOB Trailer

#5. Select the BOB Trailer Axle that fits your bike.

Thread Pitch

Length of Axle Shaft

Application

Part Number

1.0 mm

152 or 167 mm

BOB Trailers

BOB117

1.0 mm

162, 167 or 172 mm

BOB Trailers

BOB113

1.0 mm

175 or 181 mm

BOB Trailers

BOB116

1.0 mm

214 or 229 mm

BOB Trailers

BOB115

1.5 mm

159 or 165 mm

BOB Trailers

BOB112

1.5 mm

172 mm

BOB Trailers

BOB104

1.5 mm

172 or 178 mm

BOB Trailers

BOB114

1.5 mm

182 or 188 mm

BOB Trailers

BOB122

1.5 mm

209 mm

BOB Trailers

BOB106

1.5 mm

229 mm

BOB Trailers

BOB108

1.75 mm

167 mm

BOB Trailers

BOB121

1.75 mm

174 mm

BOB Trailers

BOB101

1.75 mm

174 or 180 mm

BOB Trailers

BOB111

1.75 mm

192 or 198 mm

BOB Trailers

BOB110

1.75 mm

209 mm

BOB Trailers

BOB109

1.75 mm

217 or 229 mm

BOB Trailers

BOB107

All axles are compatible +/- 2 mm in length.

Yoke Mount

#5. Select the Yoke Mount Axle that fits your bike.

Thread Pitch

Length of Axle Shaft

Application

Part Number

1.0 mm

152 to 167 mm

Yoke Mount Trailers

TWO217

1.0 mm

160 to 172 mm

Yoke Mount Trailers

TWO213

1.0 mm

175 to 181 mm

Yoke Mount Trailers

TWO216

1.0 mm

214 to 229 mm

Yoke Mount Trailers

TWO215

1.5 mm

159 to 165 mm

Yoke Mount Trailers

TWO212

1.5 mm

172 or 178 mm

Yoke Mount Trailers

TWO214

1.5 mm

209 mm

Yoke Mount Trailers

TWO206

1.5 mm

229 mm

Yoke Mount Trailers

TWO208

1.75 mm

167 mm

Yoke Mount Trailers

TWO221

1.75 mm

174 or 180 mm

Yoke Mount Trailers

TWO211

1.75 mm

192 mm

Yoke Mount Trailers

TWO202

1.75 mm

192 or 198 mm

Yoke Mount Trailers

TWO210

1.75 mm

209 mm

Yoke Mount Trailers

TWO209

1.75 mm

217 to 229 mm

Yoke Mount Trailers

TWO207

All axles are compatible +/- 2 mm in length.

Thunder Bolt-on

#5. Select the Thunder Bolt-on Axle that fits your bike.

Thread Pitch

Length of Axle Shaft

Application

Part Number

1.0 mm

152 or 167 mm

12mm Bolt-on

BOL217

1.0 mm

160, 167 or 172 mm

12mm Bolt-on

BOL213

1.0 mm

175 or 181 mm

12mm Bolt-on

BOL216

1.0 mm

214 or 229 mm

12mm Bolt-on

BOL215

1.5 mm

159 or 165 mm

12mm Bolt-on

BOL212

1.5 mm

172 mm

12mm Bolt-on

BOL204

1.5 mm

178 mm

12mm Bolt-on

BOL214

1.5 mm

182 or 188 mm

12mm Bolt-on

BOL222

1.5 mm

209 mm

12mm Bolt-on

BOL206

1.5 mm

229 mm

12mm Bolt-on

BOL208

1.75 mm

167 mm

12mm Bolt-on

BOL221

1.75 mm

174 mm

12mm Bolt-on

BOL201

1.75 mm

180 mm

12mm Bolt-on

BOL211

1.75 mm

192 mm

12mm Bolt-on

BOL202

1.75 mm

198 mm

12mm Bolt-on

BOL210

1.75 mm

209 mm

12mm Bolt-on

BOL209

1.75 mm

217 or 229 mm

12mm Bolt-on

BOL207

All axles are compatible +/- 2 mm in length.

Lightning Bolt-on - Front

#5. Select the Lightning Bolt-on Axle that fits your fork.

Thread Pitch

Length of Axle Shaft

Application

Part Number

15mm Diameter axles with M15x1.5 Thread

M15 x 1.5

125 mm

15mm Bolt-on Front

LIG507

M15 x 1.5

142 mm

15mm Bolt-on Front

LIG513

M15 x 1.5

148 mm

15mm Bolt-on Front

LIG501

M15 x 1.5

158 mm

15mm Bolt-on Front

LIG503

M15 x 1.5

198 mm

15mm Bolt-on Front

LIG515

15mm Diameter axles with M14 x 1.5 Thread

M14 x 1.5

133 mm

15mm Bolt-on Front

LIG508

M14 x 1.5

138 mm

15mm Bolt-on Front

LIG509

M14 x 1.5

145 mm

15mm Bolt-on Front

LIG502

M14 x 1.5

155 mm

15mm Bolt-on Front

LIG504

12mm Diameter axles

M12 x 1.0

117 or 123 mm

12mm Bolt-on Front

LIG506

M12 x 1.5

125 mm

12mm Bolt-on Front

LIG505

M12 x 1.5

120 mm

12mm Bolt-on Front

LIG511

M12 x 1.75

122 mm

12mm Bolt-on Front

LIG512

All axles are compatible +/- 2 mm in length.

Lightning Bolt-on - Rear

#5. Select the Lightning Bolt-on Axle that fits your bike.

Thread Pitch

Length of Axle Shaft

Application

Part Number

1.0 mm

153 to 158 mm

12mm Bolt-on

LIG617

1.0 mm

162 to 167 mm

12mm Bolt-on

LIG603

1.0 mm

167 to 172 mm

12mm Bolt-on

LIG613

1.5 mm

159 to 165 mm

12mm Bolt-on

LIG612

1.5 mm

172 mm

12mm Bolt-on

LIG604

1.5 mm

178 mm

12mm Bolt-on

LIG614

1.5 mm

209 mm

12mm Bolt-on

LIG606

1.5 mm

229 mm

12mm Bolt-on

LIG608

1.75 mm

167 mm

12mm Bolt-on

LIG621

1.75 mm

174 mm

12mm Bolt-on

LIG601

1.75 mm

180 mm

12mm Bolt-on

LIG611

1.75 mm

192 mm

12mm Bolt-on

LIG602

1.75 mm

198 mm

12mm Bolt-on

LIG610

1.75 mm

209 mm

12mm Bolt-on

LIG609

1.75 mm

229 mm

12mm Bolt-on

LIG607

All axles are compatible +/- 2 mm in length.

Resistance Trainer

#5. Select the Trainer Axle that fits your bike.

Thread Pitch

Length of Axle Shaft

Application

Part Number

1.0 mm

152 or 167 mm

Resistance Trainer

TRA217

1.0 mm

160, 167 or 172 mm

Resistance Trainer

TRA213

1.5 mm

159 or 165 mm

Resistance Trainer

TRA212

1.5 mm

172 mm

Resistance Trainer

TRA204

1.5 mm

178 mm

Resistance Trainer

TRA214

1.75 mm

167 mm

Resistance Trainer

TRA221

1.75 mm

174 mm

Resistance Trainer

TRA201

1.75 mm

180 mm

Resistance Trainer

TRA211

1.75 mm

192 mm

Resistance Trainer

TRA202

1.75 mm

198 mm

Resistance Trainer

TRA210