Bomber BP 2, 4mm light Boot/Binding/Axle Alignment Question??

[barryj]

My K168 with the BP is riding great, but I was thinking of moving the front binding forward one slot on my TD 3's to get the front axle under my big toe more.... i think the beginning of my big toe joint is over the axle but  It's hard to judge  from feel and  impossible to see with my foot in the boot on the plate/binding.....so I think I'm close to being over the axle but probably behind it still......but thing is I use Gilmour bias, so front binding is off of what center was/is(??) already.........so not sure what to do....except try it.     I'm using the widest UPM settings on the plate

As I thought I understood it:

Front Foot -   the axle is to under the beginning of big toe joint 

Rear Foot -    the axle is to be under your heel

First two photos show both sides of Front  foot boot/binding/axle interface.  Third photo is rear boot/binding/axle alignment.

Am I missing something in my setup??

Edited February 6, 2019 by barryj

[SunSurfer]

Looks fine to me. The key thing is not to get the joint between your big toe and foot significantly forward of the axle.

[barryj]

Thanks SS!           

There is a contingent out there that's telling me the rear axle is supposed to be under the Middle of The Foot.....not under your heel.   Any logic to this??

[SunSurfer]

As we discussed in your original thread about setting up your BBP, generally the starting point is your normal stance distance set symmetrically about the centre of the plate. Set the interaxle distance so that the front axle is as above, and the rear axle set symmetrically relative to the front axle about the centre of the plate. That will generally have the rear axle under the heel.

I don't know of any reason to have the rear axle offset forward in the way you describe, but I'm always interested in logically presented arguments for new approaches.

[daveo]

• Most racers will place the rear axle as close to the middle of their back 
binding as possible to establish a direct connection between boot and board. 
The front axle is placed more towards the front toe.

That's from the Apex instruction manual. 

4 hours ago, SunSurfer said:

I don't know of any reason to have the rear axle offset forward in the way you describe, but I'm always interested in logically presented arguments for new approaches.

Above

[barryj]

Ok....tried the advice of moving the binding to get the BP axle more towards center of my rear foot.  Moved rear binding back 1 set/row of inserts of the center disk of my TD's

I took it out for a spin in crappy conditions.  All I can say is i didn't notice any negatives from moving the rear binding backwards....it did widen my stance and centered me more....not uncomfortable but I think I want to get back over the nose..... but if I move the front binding forward to get back over the nose I  widen my stance even more    

I'm at the widest UPM mount settings....guess I could move the UPM axles in towards each other 1 set of slots ??  Don't remember.....is UPM/BP mount hole choice based on rider weight or type of ride/turn desired??

The angles in the  photos are deceiving, but:  

1st photo Before - axle under heel = 20.5 stance

2nd photo After - axle forward of heel = 21 stance

 

Edited February 12, 2019 by barryj