- 406923 fits all single-bolt, rotary-head Bontrager posts (Race, Race Lite, Race X Lite and XXX as well as Madone seatmasts)
- 406923 ears are used for oversize rails 7x9mm
- 421564 ears are for 7x10mm oversize carbon saddle rails
|Part No.||MSRP*||Model||Color||Use With||Weight|
|421564||11.99||Single-Bolt Rotary Head Ears 7x10mm Rail||Silver||All Bontrager rotary head seatposts||20.0|
|406923||11.99||Single-Bolt Rotary Head Ears 7x9mm Rail||Silver||All Bontrager rotary head seatposts||20.0|
|272628||9.99||Single-Bolt Rotary Head Parts Kit||Black||All Bontrager rotary head seatposts||54.0|
*Pricing is set by Bontrager retailers and does not include freight, import duties or taxes for retailers outside of the US.