Rear springs uprated to 275lbs/inch but...

My experiment was to uprate the rear spring poundage from stock 250lbs/inc to 275lbs/inch and see if it stopped floorpan scraping without any negative side effects.

However, I didn't double check the size and trusted the Protech website spec. I failed to take a note of the size when originally building or prior to ordering - so sods law meant I managed to buy short rear springs.

I have now confirmed the correct rear spring spec on a Ford Zero is 8"x250lbs. 1.9" ID.

The 7" tall springs are just long enough to give me 125mm sill clearance - could do with another 5mm (I run 130mm rear, 120mm front). The risk is I'm compressing the flex out of the springs just for ride height and losing travel/risk binding the coils when driving.

The ride is excellent, could well be placebo of course, on the other hand everything feels tighter in the rear end, still some cushion, but a firmer feel like the rear end is glued to the deck.

The 275lbs is definitely staying. Heavy me + boot mounted spare wheel etc needs that little extra, added firmness without being harsh. The 275 vs 250 is extra loading on the suspension mounts - but my crude thinking is if the fronts can take 350 then the rears should survive - only time will tell.

Test run across Romney Marsh on a summer evening was glorious!

Update - 8" x 275lbs ordered and fitted
Anyone in the market for the 7x275s when they come off drop me a line.