monkeyseemonkeydo

I was wondering that too!

But don't be surprised when it cracks...

Looks about 19" maybe (easy to check...) and worth maybe £30.

That's it- I take it there's a little booklet that has all the answers in it and you just have to remember them, I did it quickly this morning and got 10/24 in 4 minutes and quite honestly don't know whic ones I got right and which ones I got wrong they were so obscure and for the most part irrelevant. Edit: Actually, is that really the official practice test thing? Surely it should be in a .gov.uk domain?

Gearing looks incredibly light in that first vid.

Possibly at some point but not for a long time... Really wish I'd done a screen print- you all think I'm nuts!

Ah, fair enough. I obviously can't read too good so just look at the pretty pictures .

What are you looking at? Looks like a normal lever to me...

Hey chief, already gone to a 12mm Maxle on the rear which as you say made a big difference .

It's noticeably stiffer when you grab the forks with the bike upside down which should result in things being more planted on the trail but haven't really tested it properly yet. No, these basically replace a spindly 5mm QR skewer with a stiffer 9 or 10mm hollow axled QR. The wheel still operates with a QR lever (rather than bolts) but it should be stiffer and stronger. QR's like these: Rather than these:

I've now converted my front Commencal hub to a 10mm bolt through (modified 10mm rear Superstar QR) and the Inspired to a 9mm bolt through so thanks for putting me on to them Mr Oliver!

Not in this thread just in general posting mindless drivel and generally trolling like a goodun'. Edit: In fact your attitude in this thread is enough to support the theory.

Ever wonder if maybe people would be more helpful if you weren't such a dickhead on here the rest of the time? Can't be arsed offering advice so yeah, unlucky and good luck sorting it I guess.

Pretty much everyone else has managed...

I've got one of those Beto ones too and for the number of times it gets used it's spot on.

Sorry dude, secrecy act has it under wraps until around 2016 I believe!

I wasn't so much saying it was faux/bad rather that it's supposedly a drift ute yet they've added a diffuser to potentially produce downforce (and therefore increase grip and stability) when my instinct tells me that a drift car wants to be inherently unstable with as little grip as possible (within reason). Edit: happy for someone to point out why a bit of downforce/reduced lift might be good for a drift car but doesn't seem to tally with how I see drifting! Cheers Ad... that page (and photo!) leaves a lot to be desired! But yeah Aero Engineering degree followed by a doctorate in rally car aerodynamics and now manage and consult for the University wind tunnels .

I would also hazard a guess that the software in anything from a mobile phone to a set top box and maybe even a microwave involves maths and series' of some kind. As for using maths in jobs the list is pretty much endless. Any kind of engineering from Civil to F1, manufacturing, software development, computer science, electronics, accountancy (!)... surely even being a bike mechanic involves some maths in the form of geometry etc.

Basically provided the floor upstream of the ramp is reasonably smooth and the transition to the ramp doesn't make the flow separate then it should help reduce drag while increasing downforce. If it's done wrong then I think the worst that could happen is that it won't be able to do anything but it probably wouldn't make things worse.

In theory yes. Because of the ramp you can effectively reduce the size of the wake of the car and so reduce drag.

Not really. In motorsport terms (i.e. F1) basically you have high speed, low pressure air under the car acting on the floor (creating downforce) and the diffuser's job is to return that air to atmospheric pressure as efficiently as possible. The diffuser itself is basically a pressure recovery device.

But diffusers don't generate downforce at the rear, they allow the floor to work harder so the force will be effectively exerted between the axles somewhere, increasing both front and rear downforce.

You're kidding, right? I'm struggling to think of much in the real world that doesn't use maths. You can't be serious...

That makes no sense at all. Edit: but then I have just googled 'rear diffuser drift car' and found some very bad science on aerodynamics so there you go.

Not a fan. The bike in the background looks interesting though. KTM turned cafe racer? Engineered to slide complete with a downforce inducing faux diffuser?...