Raked triple trees?

[GSVR]

This is quite a technical question and I'm just at the beginning of finding out about it myself.

How many modern racebikes or or puresports roadbikes come out with raked triple trees. Is there any real advantage in this increased complexity from a manufacturing point of view?

Thanks in advance.

Also would I expect to see much difference between the rake and trail figures for a Moto3 vs a MotoGP bike.

[Drew]

What am I missing? What do you mean "raked triple trees"?

[nodrog:Me]

[Maido]

is that flash talk for adjustable steering head angle? If yes, then just about every race bike at a world level has them (and some in domestic competitions too, naughty naughty)

[Drew]

is that flash talk for adjustable steering head angle? If yes, then just about every race bike at a world level has them (and some in domestic competitions too, naughty naughty)

Standard equipment on some Ducati models.

[GSVR]

No not at all like Ducatis two way turn it 180 degree thing.

Its when the forks are not at the same angle as the steering axis. This alters the trail to rake numbers. So you could get more trail with less rake.

Kinda like offset works but provides more leverage at the grips/handlebars

[Mental Trousers]

is that flash talk for adjustable steering head angle? If yes, then just about every race bike at a world level has them (and some in domestic competitions too, naughty naughty)

I think Gary might be talking about the offset of the top triple clamp relative to the bottom triple clamp being different. It changes the angle of the forks so they're different to the angle of the steering head.

At least that's how I read it.

[GSVR]

I think Gary might be talking about the offset of the top triple clamp relative to the bottom triple clamp being different. It changes the angle of the forks so they're different to the angle of the steering head.

At least that's how I read it.

Yes you got it. Great easy way to explain it.

[Drew]

Oh right. Never heard of it before.

Makes bearing tolerances and tension UUUUUBER important.

[Grumph]

There's no advantage to non parallel triples. Rake angle is still the steering head angle.
It is one way to compensate for the wrong trail however but it's still a lot better to either make clamps with a different offset or as has been mentioned use adjustable head races.

[codgyoleracer]

Take a look at a harley, they do it as standard. Head angle different to fork angle.

Tony Foales book explains it all very well

[Drew]

There's no advantage to non parallel triples. Rake angle is still the steering head angle.
It is one way to compensate for the wrong trail however but it's still a lot better to either make clamps with a different offset or as has been mentioned use adjustable head races.

I think it would add stability, because the front of the bike wouldn't rise and fall as much when turning the bars...Maybe. I'd prolly need to draw it and think for too long before I knew one way or the other.

[GSVR]

Take a look at a harley, they do it as standard. Head angle different to fork angle.

Tony Foales book explains it all very well

Yeah but don't Harley do it backwards? They are decreasing the trail.

Desirable to have less steering head rake and increase the trail.

And I think is not to do with when the bikes upright but when its at full lean.

[GSVR]

I think it would add stability, because the front of the bike wouldn't rise and fall as much when turning the bars...Maybe. I'd prolly need to draw it and think for too long before I knew one way or the other.

Something like that I reacon. Why else would they go to all that trouble. Apparently you can get adjustable versions of this too.

[nodrog:Me]

.... Apparently you can get adjustable versions of this too.

yep

http://www.podiumracingonline.com/ch.../prod_125.html