Large (over 8mm)

So you want to use one of the big Colson wheels with the large bore, but you don't want to use a monster shaft. This is what you need to reduce the large bore down to something more manageable. These are custom built 6061 Aluminum bore reducers that were made to fit the Colson Performa wheels. These reducers are made especially for Robotic Combat standardsLength: 3 1/4"Outside diameter: 1 15/16"Inside bore diameter: 1 1/4"Keyway: 1/4"0-CHR1

So you want to use one of the big Colson wheels with the large bore, but you don't want to use a monster shaft. This is what you need to reduce the large bore down to something more manageable. These are custom built 6061 Aluminum bore reducers that were made to fit the Colson Performa wheels. These reducers are made especially for Robotic Combat standardsLength: 2.0"Outside diameter: 1.18"Inside bore diameter: 1/2"Keyway: 3/16"0-CHR7

So you want to use one of the big Colson wheels with the large bore, but you don't want to use a monster shaft. This is what you need to reduce the large bore down to something more manageable. These are custom built 6061 Aluminum bore reducers that were made to fit the Colson Performa wheels. These reducers are made especially for Robotic Combat standardsLength: 1.5"Outside diameter: 1.18"Inside bore diameter: 5/8"Keyway: 3/16"0-CHR17

So you want to use one of the big Colson wheels with the large bore, but you don't want to use a monster shaft. This is what you need to reduce the large bore down to something more manageable. These are custom built 6061 Aluminum bore reducers that were made to fit the Colson Performa wheels. These reducers are made especially for Robotic Combat standardsLength: 1.13"Outside diameter: .90"Inside bore diameter: 5/8"Keyway: 3/16"0-CHR22

So you want to use one of the big Colson wheels with the large bore, but you don't want to use a monster shaft. This is what you need to reduce the large bore down to something more manageable. These are custom built 6061 Aluminum bore reducers that were made to fit the Colson Performa wheels. These reducers are made especially for Robotic Combat standardsLength: 1.12"Outside diameter: .90"Inside bore diameter: 5/8"Keyway: 3/16"0-CHR21

Drill out your own bore and keywayMaterial: 6061 Aluminumoutside diameter: 1-15/16"length: 3 1/4"stock bore" .25"keyway: 1/4"0-CHRBL1

Drill out your own bore and keywayMaterial: 6061 Aluminumoutside diameter: .60"length: 1.0"stock bore" .25"keyway: 1/8"0-CHRBL5

Drill out your own bore and keywayMaterial: 6061 Aluminumoutside diameter: 1/2"length: .88"stock bore" .25"keyway: 1/8"0-CHRBL6

Custom made to fit motors 64038, 74038, 84088, T64, T74 and T84 Weight: .3125 lb Machined out of 1/2" x 3.5" 6061 Aluminum Bolt Circle: (4) @ 2 3/4" and (4) @ 2 13/16" NPC-PH448 CAD Drawing ...

Custom made to fit motors B81HT and B82HT3/4 inch bore with a 3/16 inch keywayWeight: .5 lbMachined out of 1/2" x 3.5" 6061 AluminumBolt Circle: (4) @ 2 3/4" and (4) @ 2 13/16"NPC-PH804

Custom made to fit motors NPC-B81 and NPC-B8217mm bore with 6mm keywayNPC-PH817