Thread: Opinions on my Disco1 springs

I bought a pair of firestones for mine a few weeks ago and a pair for Dad's jeep while I was at it. USPS (2nd tick-a-box) cost US$60. The box was 300x350x460. Had them in about 2 weeks or less.

Haven't had time to fit them yet because
(1) it was raining when I got my service-the-car day
(2) I thought the lift might need a spacer and so some research might be in order and
(3) I want to run the airlines thru to the cab so I can inflate to maximum or near to then air down on the run to comfort level, with a crossover tap as well.

Originally Posted by 100I

I bought a pair of firestones for mine a few weeks ago and a pair for Dad's jeep while I was at it. USPS (2nd tick-a-box) cost US$60. The box was 300x350x460. Had them in about 2 weeks or less.

I think their website quotes the second option as US$45 so US$60 for two packages is about a $15 saving for each package.

They haven't got back to me yet as of this morning. Can't check private email from work.

Originally Posted by 100I

(3) I want to run the airlines thru to the cab so I can inflate to maximum or near to then air down on the run to comfort level, with a crossover tap as well.

I was thinking of doing this but I know I won't get around to it. I like the idea of behind the petrol filler door.

Originally Posted by Utemad

Front LAN106
50mm lift, up to 30kg extra accessories, 200psi

Rear LAN113
50mm lift, constant 100kg extra load, progressive 240-345psi

To be a pedant for a moment, spring rates can't be expressed as "psi" - the inches aren't squared. It will be lb/in, or N/mm.

So your front springs need 200lb of weight for each inch of compression. Your rears need 240 at the start and 345 lb for each inch at the end (because they are progressive).

As I recall, a stock RRC with a boge self leveller only has about 170-200 lb/in rear springs.

You might get some sagging in the back, but the 345 lb/in should mean they won't bottom out.

But as others have said, airbags could help.

Cheers Ben. I knew it was measured in pounds but guess I didn't get it quite right.

As you say the rear springs are quite heavy duty as it is. I like the ride quality as it is so getting firmer non progressive springs would wreck the ride quality. So bags it is.
As you say I have never felt the suspension bottom out on bumps. You can see the marks where the bump stops have touched off road but never felt them smack on high speed bumps and washouts etc.

I was just wanting too much out of the suspension really.