SOFT TOP weight

wasp47 · Postby **wasp47** » Wed Nov 01, 2017 1:00 pm

Hi
I have searched but unable to find the weight of an NB Glass window soft top including frame. Does anyone have the answer to this secret. :lol:

Cheers
Steven

Postby **NitroDann** » Wed Nov 01, 2017 1:16 pm

Around 25kg but I can't remember whether it's 22 or 28kg...

wasp47 · Postby **wasp47** » Wed Nov 01, 2017 4:55 pm

NitroDann wrote:Around 25kg but I can't remember whether it's 22 or 28kg...

Thank you

Postby **NitroDann** » Wed Nov 01, 2017 5:36 pm

A hard top is 16 or 18 I think too.

93_Clubman · Postby **93_Clubman** » Thu Nov 02, 2017 11:11 am

Early HT (no headliner & no demister) about 40lbs - later HT (headliner & demister) about 50lbs: https://www.miata.net/garage/hardtop/

StillIC · Postby **StillIC** » Thu Nov 02, 2017 7:01 pm

NA soft top (PVC window) is 15 kg (as weighed by me on a load cell).
Glass window of dims 84cm x 39cm x 3.5mm (or thicker?), density 2.5 g/cm3, weighs at least 2.9 kg.

I am going to say the glass window soft top weighs 18 kg (or 40 lbs).

The lightest Mazda hardtop was on the original NA6, of which at least 5 kg is glass window (3.5 mm thick according to Mazda design sketches). Later models were heavier with gradual changes. I find it difficult to believe that any Mazda hardtop is as light as a glass window soft top (40 lbs).

StillIC · Postby **StillIC** » Thu Nov 02, 2017 7:36 pm

I note that the CarbonMiata GRP hardtop is 11 kg without window, so ~16 kg with a window.

mx589 · Postby **mx589** » Thu Nov 02, 2017 8:26 pm

Complete nb glass window softop is around 20kg

hks_kansei · Postby **hks_kansei** » Fri Nov 03, 2017 7:07 am

93_Clubman wrote:Early HT (no headliner & no demister) about 40lbs - later HT (headliner & demister) about 50lbs: https://www.miata.net/garage/hardtop/

I doubt there's 4kg in the liner and the demister.

Demister is a few lines of super thin copper and a plastic plug. 500g at most.

And the liner is a sheet of 2mm foam, which I doubt would even weigh a kilo.

I'd suggest the weights in the miata net garage aren't correct.

93_Clubman · Postby **93_Clubman** » Fri Nov 03, 2017 9:01 am

hks_kansei wrote:doubt there's 4kg in the liner and the demister.

Haven't had my NB8 HT along side an early NA6 HT to compare inside & out, but understand construction & finish also is better.

hks_kansei · Postby **hks_kansei** » Fri Nov 03, 2017 9:49 am

True, Mazda may have included extra structural stuff inside.

From comparing my NB top to my gfs NA top the construction looks identical externally.

But, I'm not cutting open a perfectly good top to check if the NB one has thicker plastic, or bracing or something.