Warning – possibly the most dullest post in ov9’s history.
So back in December 2023 I used an ebay kit to chemically blacken the Evora’s rusty wheel bolts (to make them prettier, and to provide some level of corrosion protection).
Just a few months later (Apr-24) I posted an image of one of my wheels and Mito noticed the wheel bolts were showing surface corrosion again. And he was bastard correct.

Another Lotus forum user who had used the same cold-blackening process on a brand new set of bolts seemed to have far longer lasting results.
(Aside : you can of course buy aftermarket bolts that are already blackened, but none of them incorporate the captive tapered washer - designed to avoid damage to the bolt seat area on the wheel. Which I’d obviously much prefer to keep).
So I finally relented and bought a new set of OEM wheel nuts, with the intent to purchase another cold-blackening chemical kit. Then I decided that - since I was splurging out for a new set of nuts - I might as well spend a little more and do a proper job. I got Eliseparts to send a new set directly to a metal finishing/electroplating company to have them zinc coated with black passivation.
They are now black. Which is good.
And should not corrode. Which is also good.
As per the very exciting images attached, I also took the opportunity to purchase a wheel mounting alignment tool/pin thing that I should probably have bought 30+ years ago. For less than a tenner it makes removing wheels marginally easier (maybe?), and replacing wheels far easier (when you have a car which uses wheel bolts as opposed to captive studs plus wheel nuts and could really do with 3 arms).
Eagle-eyed readers may also notice that the latest Lotus bolts are longer than the original ones. 31mm thread vs 26mm. So that’s 5 better per bolt. But on top of that – due to different bolt geometry the new ones are 3g lighter…. a 60g overall vehicle weight saving! Colin Chapman would be proud of me.
