rear spring

Wheels, shocks, forks, frame
Post Reply
col
Premix Junkie
Posts: 1305
Joined: Wed Jul 26, 2006 8:49 am
Location: Waikato, New Zealand

rear spring

Post by col »

Anyone know what the standard spings length and rate is in lbs/inch or N/mm
mj43
Premix Junkie
Posts: 1329
Joined: Tue Jul 25, 2006 7:44 pm
Location: Middle England

Post by mj43 »

Nope

But I race on an 8.5kg/mm or about 475lb/in

I guess for the road some where between 7.5kg/mm (softish) to 8.0kg/mm would be about right.

Also depends a bit on your weight - I clock in at 12.5 stone.

Length you should be able to measure - other dimension you need is dia.

I use Faulkner springs which I get from Demon tweaks. Black is standard but colours available at extra cost.
col
Premix Junkie
Posts: 1305
Joined: Wed Jul 26, 2006 8:49 am
Location: Waikato, New Zealand

Post by col »

they're the ones i was looking at but didnt know what to get.
as i'm not as podgy as you (a trim 11st) i think 7.5/8kg would be about right then :wink:
Professor
Heavy Smoker
Posts: 158
Joined: Mon Nov 20, 2006 9:23 pm
Location: Cornwall

springy

Post by Professor »

How did you get on col??

Did you get round to getting a new spring? Just rebuilt my shock and thinking std Kwak spring feels a bit soft and has alot of preload to set it up.

Mark all you need to do to make your KR go faster is go on a diet!
Hardcore you know the score
col
Premix Junkie
Posts: 1305
Joined: Wed Jul 26, 2006 8:49 am
Location: Waikato, New Zealand

Post by col »

not bought yet, waas just fishing for comments on wether they were any good
Professor
Heavy Smoker
Posts: 158
Joined: Mon Nov 20, 2006 9:23 pm
Location: Cornwall

springs

Post by Professor »

Got a 7.7kg/mm on mine at the min, a perfect match too the 0.8kg/mm fork springs in my KR1S,


I weigh 11.5 stone and the ride is slightly on the stiff side for the road but probably perfect for the track (not tried trackday in current setup yet)
Hardcore you know the score
User avatar
nate
Heavy Smoker
Posts: 437
Joined: Wed Jan 10, 2007 4:57 pm
Location: Cornwall

Post by nate »

Just been out to measure mine up as it needs replacing (the spring that is)


For everyones information the rear spring details are

2.25 inch internal diameter

6.6 inch unsprung length (so i have gone for a 7" one) (ooh er missus)

7kg / mm is the equivelent of 385 lbs per inch
8kg / mm is the equivelent of 440 lbs per inch

for lbs per foot, multiply by 12

cheers

Nate
Post Reply