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With Bikespin, our main objective is to enable riders’ community to discover new tricks. So it seemed logical to open source all our work. If you have any ideas, we’ll be glad to discuss it with you!
👇 Download 2D and 3D files:
Material : EN AW-7075 T6
Quantity : 1
Comment : 0.2mm gap between Ø16 Bore and Ø15.8 Shaft to avoid jamming the Shaft when tightening the frame tube screw.
Material : EN AW-7075 T6
Quantity : 1
Comment : R8 to limit stress concentration (critical zone).
Material : EN AW-7075 T6
Quantity : 1
Comment : Ø16 press-fitted onto the Shaft.
Material : EN AW-7075 T6
Quantity : 2
Comment : The 2 Rings act as end stop for the Spring.
Material : POM-C
Quantity : 1
Comment : To change the different operating modes.
Material : EN AW-6060 T6
Quantity : 1
Comment : Grease the 30° chamfer for fitting on O-rings.
Material : Rubber
Quantity : 2
Comment : D1 = 30 ; D2 = 36 ; e = 3
Material : Iglidur G
Quantity : 1
Comment : To reduce friction between Spring and Bore.
Material : Music wire
Quantity : 1
Comment : D1 = 14 ; D2 = 18 ; e = 2 ; L0 = 98 ; k = 3,19N/mm
Material : Stainless steel A2
Quantity : 1
Comment : D1 = 6.4 ; D2 = 18 ; e = 1.6
Material : Stainless steel A2
Quantity : 1
Comment : CHC M6 L30
N°
Designation
Material
Quantity
Comment
01
Bore
EN AW-7075 T6
1
0.2mm gap between Ø16 Bore and Ø15.8 Shaft to avoid jamming the Shaft when tightening the frame tube screw.
02
Shaft
EN AW-7075 T6
1
R8 to limit stress concentration (critical zone).
03
ShaftHead
EN AW-7075 T6
1
Ø16 press-fitted onto the Shaft.
04
Ring
EN AW-7075 T6
2
The 2 Rings act as end stop for the Spring.
05
Spacer
POM-C
1
To change the different operating modes.
06
Sleeve
EN AW-6060 T6
1
Grease the 30° chamfer for fitting on O-rings.
07
O-ring
Rubber
2
D1 = 30 ; D2 = 36 ; e = 3
08
Plain bearing
Iglidur G
1
D1 = 12 ; D2 = 14 ; D3 = 18 ; e = 1 ; L = 4
To reduce friction between Spring and Bore.
09
Spring
Music wire
1
D1 = 14 ; D2 = 18 ; e = 2 ; L0 = 98 ; k = 3,19N/mm
10
M6 washer
Stainless steel A2
1
D1 = 6.4 ; D2 = 18 ; e = 1.6
11
M6 screw
Stainless steel A2
1
CHC M6 L3
We’ve spent several years designing and improving the Bikespin seatpost. Our functional analysis is the best tool to help you understand our design choices. Here are the different functions that the spinning seatpost must fulfil (PF = Primary Function ; SF = Secondary Function):
PF1 : Connect the frame to the seat.
PF2 : Allow the user to intentionally rotate the seat relative to the frame.
SF1 : Ensure the seat stays in place during classic use and classic tricks.
SF2 : Index the seat after each rotation, every 360°.
SF3 : Allow seatpins in both directions, without limits.
SF4 : Include a rotation-force adjustment to simplify seatspin and bikespin.
SF5 : Include an On/Off switch to lock/unlock any movement of the product.
SF6 : Allow the user to access the On/Off switch without any dismantling.
SF7 : Allow the user to adjust the seat position.
SF8 : Can be fully disassembled/reassembled by the user.
SF9 : Resist to the user.
SF10 : Resist its environment and external conditions.
SF11 : Comply with legislation and standards.
SF12 : Fits into Bmx frames without diameter adapters.
SF13 : Fits Mtb frames with diameter adapter (Ø27.2 / 30.9 / 31.6).
SF14 : Prevents the seat from colliding with the rear tire.
SF15 : Generate acceptable noise for the user when rotating.
SF16 : Ensure there is no noticeable backlash nor rattling noise when the seat is stationary.
SF17 : Do not cause direct injury to the user (pinches, cuts, …).
SF18 : Measure at least 170mm (6.7″) in total height.
SF19 : Weigh less than 500g (18oz).
SF20 : Do not require any additional accessories on the bike (cables, levers, etc.).
SF21 : Do not integrate electronics.
SF22 : Ensure SF3 as long as the tightening of the frame tube screw is < 20Nm.
SF23 : Have a low maintenance frequency (< 2 times/year).
SF24 : Be aesthetically pleasing.
PF1 : Connect the frame to the seat.
PF2 : Allow the user to intentionally rotate the seat relative to the frame.
SF1 : Ensure the seat stays in place during classic use and classic tricks.
SF2 : Index the seat after each rotation, every 360°.
SF3 : Allow seatpins in both directions, without limits.
SF4 : Include a rotation-force adjustment to simplify seatspin and bikespin.
SF5 : Include an On/Off switch to lock/unlock any movement of the product.
SF6 : Allow the user to access the On/Off switch without any dismantling.
SF7 : Allow the user to adjust the seat position.
SF8 : Can be fully disassembled/reassembled by the user.
SF9 : Resist to the user.
SF10 : Resist its environment and external conditions.
SF11 : Comply with legislation and standards.
SF12 : Fits into Bmx frames without diameter adapters.
SF13 : Fits Mtb frames with diameter adapter (Ø27.2 / 30.9 / 31.6).
SF14 : Prevents the seat from colliding with the rear tire.
SF15 : Generate acceptable noise for the user when rotating.
SF16 : Ensure there is no noticeable backlash nor rattling noise when the seat is stationary.
SF17 : Do not cause direct injury to the user (pinches, cuts, …).
SF18 : Measure at least 170mm (6.7″) in total height.
SF19 : Weigh less than 500g (18oz).
SF20 : Do not require any additional accessories on the bike (cables, levers, etc.).
SF21 : Do not integrate electronics.
SF22 : Ensure SF3 as long as the tightening of the frame tube screw is < 20Nm.
SF23 : Have a low maintenance frequency (< 2 times/year).
SF24 : Be aesthetically pleasing.
Note that the Bikespin V2 seatpost does not 100% validate each of these functions. You’ll have to wait (or develop yourself) the Bikespin V3 for that 😉
Note that the Bikespin V2 seatpost does not 100% validate each of these functions. You’ll have to wait (or develop yourself) the Bikespin V3 for that 😉
