Suspension upgrade question

[1olbull]

Thanks for this. I was checking numbers and rake/trail on the Rocket is 32 ˚/6" and for example, a Yamaha R1 is 24 ̊ /3.6" so I think there's a way to go before the Rocket gets unstable.

Do you like the smaller cross sectional front due to the change in geometry or do you think it steers lighter because it's smaller/lighter or both?

Good examples, but remember frame geometry also plays a part in this.
Read Tony Foal's book for the best data on frame design.
I found the OEM front aspect ratio to be too tall & too fat. It was way too heavy handling.

 

[barbagris]

Too much Espanol, Amigo!
Counter nose dive would be nose lift. WTF? ;-)

Oh it still dived a bit before - but once the axle heights were as god (and not triumph) intended it was more discernible (instant) dive.

 

[barbagris]

I found the OEM front aspect ratio to be too tall & too fat. It was way too heavy handling.

It is also important to look at OPTIMAL RIM size. Very early on I did find a size chart on USA Metzler that put the optimal size for the 150/80 as a 3.75". But 3.5 "acceptable". This means the tyre is a pinched fit and as such reacts differently - will tend to run better upright and feel very lazy in bends. I measured the tyre fitted and it was actually 143mm wide and the aspect ratio came out at 90%. I had quite long talks with several tyre places about it and all confirmed this is a common error (usually fitting extra wide tyres)

I currently use a 150/70 - this rolls beautifully. Same as a 140/75 - not spec'd really for a 3.5 rim but holds its form better - it is 150 wide. Maybe tougher as it is a rear tyre.

 

[1olbull]

Very interesting, Amigo!
What tire is the 150/70R17?
Smaller sidewall would produce less flex and be more stable in the twisties . . . IF it was not a pig to countersteer.

 

[barbagris]

Very interesting, Amigo!
What tire is the 150/70R17?
Smaller sidewall would produce less flex and be more stable in the twisties . . . IF it was not a pig to countersteer.

I'll look at model later when i get home - but just as nimble as the Azarro was.

 

[barbagris]

What tire is the 150/70R17?.

Bridgestone Battlax BT021R - REAR

 

[leatal]

It is also important to look at OPTIMAL RIM size. Very early on I did find a size chart on USA Metzler that put the optimal size for the 150/80 as a 3.75". But 3.5 "acceptable". This means the tyre is a pinched fit and as such reacts differently - will tend to run better upright and feel very lazy in bends. I measured the tyre fitted and it was actually 143mm wide and the aspect ratio came out at 90%. I had quite long talks with several tyre places about it and all confirmed this is a common error (usually fitting extra wide tyres)

I currently use a 150/70 - this rolls beautifully. Same as a 140/75 - not spec'd really for a 3.5 rim but holds its form better - it is 150 wide. Maybe tougher as it is a rear tyre.

Got to ask, what is the difference between a front and a rear tire?

 

[barbagris]

Got to ask, what is the difference between a front and a rear tire?

Can be a fair number of things depending on make - Though front/rear universal tyres do exist.

Rears are made to withstand higher forces generally - You can mount a rear on the front but you need to reverse its' rotation.

You should not (imo) attempt to mount a front on the rear. EVER.

 

[1olbull]

I'll look at model later when i get home - but just as nimble as the Azarro was.

I ran an Azaro and really liked it!
Awaiting info with bated breath!

 

[Ishrub]

I ran an Azaro and really liked it!
Awaiting info with bated breath!

Your going blue for nothing as he already posted it 11 hours ago.

Bridgestone Battlax BT021R - REAR