Author Topic: Rear spring preload and spring weight  (Read 183 times)

Slapading

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Rear spring preload and spring weight
« on: November 20, 2021, 03:34:09 AM »
Is there a specific amount of preload (measurement) that should be put on the rear spring. I have got the static sag at 30mm and rider sag at 115mm but have had to put quite a bit of preload on spring to acheive this. I am running 51 nm stock rear spring at the moment and weigh 97kgs with my gear on. What spring would people recommend to change to 54nm or 56nm.
« Last Edit: November 20, 2021, 11:33:48 PM by Slapading »

Slapading

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Re: Rear spring preload and spring weight
« Reply #1 on: November 22, 2021, 07:53:36 AM »
Anyone help me out please so don't order wrong spring

Trailrider383

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Re: Rear spring preload and spring weight
« Reply #2 on: November 22, 2021, 08:12:22 AM »
What bike?

Slapading

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Re: Rear spring preload and spring weight
« Reply #3 on: November 22, 2021, 10:13:58 AM »
2014 ser 300. Mainly do greenlaning/trails and bit of enduro

Trailrider383

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Re: Rear spring preload and spring weight
« Reply #4 on: November 22, 2021, 11:37:56 AM »
The owners manual should show the recommended spring rate for your weight. I found a 2015 manual and it shows this:

Poids du pilote: 65-75 kg 51N/mm
Poids du pilote: 75-85 kg 54N/mm (origine)
Poids du pilote: 85-95kg 57N/mm

Slapading

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Re: Rear spring preload and spring weight
« Reply #5 on: November 23, 2021, 12:37:43 AM »
Thanks for that my bike has a 51nm spring
on at the moment and can get a 54nm or 57nm spring from k tech. But undecided which to go for.

Slapading

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Re: Rear spring preload and spring weight
« Reply #6 on: November 23, 2021, 02:59:26 AM »
Also do you base the weight of the rear spring on weight with all gear on or weight when butt naked as have just had 1 company tell me its your butt naked weight you set soring to. 🤔

JL4049

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Re: Rear spring preload and spring weight
« Reply #7 on: November 23, 2021, 01:01:48 PM »
If you normally carry 10kg of armour/water/tools, you'll be undersprung if you use your naked weight.... Gear up, throw your camel back on and jump on the scales. Use this weight. If you ride technical terrain more, you might find the naked weight allows you to weight/deweight better though (if it causes you to need a heavier spring)