DESCRIPTION Centering Rings that fit inside of our Airframe tubes and over our Motor Mount Tubes. Commonly referred to as 5.5" diameter airframes. The airframe ID=5.38" - OD=5.54". Various sizes and packages to fit your scratch building needs! CENTERING RINGS CR-5.38-38mm: Centering rings for BT-5.38 to 38mm mount. 2 pack 1/4″ thick, includes SCM3 1/4″ eye bolt and Z clip motor retention. CR-5.38-54mm: Centering rings for BT-5.38 to 54mm mount. 3 pack 1/4″ thick, includes SCM3 1/4″ eye bolt. CR-5.38-75mm: Centering rings for BT-5.38 to 75mm motor mount. 3 pack 1/4″ thick. Includes SCM4 U bolts and Z Clip motor retention. CR-5.38-98mm: Centering rings for BT-5.38 to 98mm motor mount. 3 pack 1/4″ thick. CR-5.38-4x29mm Cluster: Centering rings for BT-5.38 to 4x29mm cluster motor mount. 3 pack 1/4″ thick, includes SCM3 1/4″ eye bolt. CR-5.38-1x38mm4x29mm Cluster: Centering rings for BT-5.38 to 1x38mm 4x29mm cluster motor mount. 3 pack 1/4″ thick, includes SCM3 1/4″ eye bolt. CR-5.38-4x38mm Cluster: Centering rings for BT-5.38 to 4x38mm cluster motor mount. 3 pack 1/4″ thick, includes SCM3 1/4″ eye bolt. CR-5.38-1x54mm4x29mm Cluster: Centering rings for BT-5.38 to 1x54mm 4x29mm cluster motor mount. 3 pack 1/4″ thick, includes SCM3 1/4″ eye bolt. CR-5.38-1x54mm6x29mm Cluster: Centering rings for BT-5.38 to 1x54mm 6x29mm cluster motor mount. 3 pack 1/4″ thick, includes SCM3 1/4″ eye bolt. CR-5.38-5x38mm Cluster: Centering rings for BT-5.38 to 5x38mm cluster motor mount. 3 pack 1/4″ thick, includes SCM3 1/4″ eye bolt. CR-5.38-3x38mm2x29mm Cluster: entering rings for BT-5.38 to 3x38mm 2x29mm cluster motor mount. 3 pack 1/4″ thick, includes SCM3 1/4″ eye bolt. CR-5.38-7x38mm Cluster: Centering rings for BT-5.38 to 7x38mm cluster motor mount. 3 pack 1/4″ thick. LNR-5.38-54mm4S25: LOC N Rings – Centering rings for BT-5.38 to 54mm motor mount. Slotted rings to accept 4 fin .25″ plywood. 3 pack 1/4″ thick, includes SCM3 1/4″ eye bolt and Z clip motor retention. Same rings used in the 5.5″ version of the Goblin. LNR-5.38-54mm3S25: LOC N Rings – Centering rings for BT-5.38 to 54mm motor mount. Slotted rings to accept 3 fin .25″ plywood. 3 pack 1/4″ thick, includes SCM3 1/4″ eye bolt and Z clip motor retention. Same rings used in the 5.5″ version of the Wolverine. LNR-5.38-75mm3S375: LOC N Rings – Centering rings for BT-5.38 to 75mm motor mount. Slotted rings to accept 3 fin .375″ plywood. 3 pack 1/4″ thick, includes SCM4 U bolts and Z clip motor retention. Same rings used in the 5.5″ version of the Ultimate Buzz. LNR-5.38-75mm4S375: LOC N Rings – Centering rings for BT-5.38 to 75mm motor mount. Slotted rings to accept 4 fin .375″ plywood. 3 pack 1/4″ thick, includes SCM4 U bolts and Z clip motor retention. Same rings used in the 5.5″ version of the Nike Zeus. BA-5.38: Bulkhead fits inside of tube coupler TC-5.38 tube coupler to fit 5.38″ airframe. 1/4″ wood bulk plate and includes 1/4"x20 U bolt.
