Huck Wizard - Totally amazing!

Another total waste of time video - Yay!

Will there be a "Full" video?!

I can do all of those tricks and I'm rubbish!

How can anybody be that good on a BMX?! It's not fair!!

And I totally would have had one back in the day.

Brilliant!!!!!!!!!!

I really don't see that extra 1 1/2" making any difference. 3/4" change in radius, or 19.05mm...so the circumference is going to change by roughly 5%. At say 10mph the wheel will go from doing 129.3 rpm to doing 122.2 rpm..."Significant!" (Based on rim diameter, for you calc checkers out there...) 7 revolutions in 270m...I think I'll be doing nothing about my wheel diameters thank you very much...

I know, what a load of bollocks!

I appreciate that you want to stand your ground here but I think you're deliberately missing the point grandmastere. As much as people slag off square tapers, there's actually nothing wrong with them - it was just the execution. Same with cotter pin cranks. Both are hand-me-downs from a bygone age, the design and materials were never really updated and as riding got gnarlyer, their limitations were found. Square tapers suffered because the square simply wasn't big enough and the disparity between the material properties of the steel spindle and the alloy cranks always meant one was going to lose out, the local stress was just too high. I think e-13 have got it right, same materials in and out, loads spread over a very large area, lovely tapered fit, no abrupt edges. Essentially, if they've worked out that the loads seen at the contact face don't exceed the contact stress limit of the materials used, it'll never wear out...that's all you ever needed to do with square tapers... Splines are not superior. I guess you could argue that this is a three lobed very slack profiled tapered spline...blah blah blah but I've now massively lost interest!

Actually, as an engineer myself, I couldn't disagree more! Haven't you heard of the morse taper? The principle here is the same, and the polygon interface removes the need for a drive tang. The axle and cranks are both Aluminium. If they're machined closely and the fit is as described then of course it's going to work. Any surface irregularity will be compressed and any slight difference in taper will more than be accommodated by the elasticity of the material. Aid this with a correctly tightened fastener and you've got a problem free zone. Splines are not superior where cyclic loads are concerned because inevitably they'll introduce stress concentrations at the roots or crests of their profiles which could lead to cracks. The lobes win again with their smoothness.