quoted weight per tyre 500grams.
according to my scales 605grams per tyre.

regular model not acx or tr or whatever they are.

Aye, Bontrager aren't great at getting the weights right on some of their products. I had one of their early carbon stems, claimed weight of 115g, actual weight was 185g.

I've bought Panaracers that were 200g-ish heavier than quoted. 600g is still light, and as Mud Xs are such a good tyre, I'd say the grip is worth it more then any weight saving.

you don't buy mud tyres on the weight though!

Could have bought 2 swampthings and saved 30 pounds, sterling that is… 600g in 2.1 size. 🙂

you don't buy mud tyres on the weight though!

And they shed mud very well – so stay weighing 600g rather than 2kg like some tyres.

585g on my scales for the two I bought the other week…

Where are the cheap swampthings?

I must admit that even I've never bothered to weigh any of the 3 pairs I've got, as above it just doesn't really matter on a mud tyre!

When were your scales last calibrated?

last year mine weighed in at an average of 540 each

I'm confused? Where does it say any of them are 500gs?

This is as per their website:
Part No. MSRP* Bead FT/RR/PR Sidewall/Tread Size TPI Type Weight
260880 46.99 Aramid Dual Black / Black 26 x 2.0 120 Tubeless/Clincher 605g
268970 46.99 Aramid Dual Black / Black 26 x 1.8 ARC 120 Tubeless/Clincher 620g
403689 46.99 Aramid Dual Black / Black 26 x 1.8 120 Tubeless/Clincher 520g

If you've got 2.0" ones, then to quote 605g and you weigh them at 605g you can't complain can you?

I remember them being to quoted at 550g for the 2.0" about 2 years ago when I got mine. Either they've 'reweighed' them or perhaps they've changed the exact spec. a little?

"regular model not acx or tr "
The regular model is a TR (Tubeless ready)
ACX is a completely seperate tyre. The look similar, but are bigger (agonst other things)?

on the packet when you buy them, and drug scales so pretty accurate

You girls really weigh your tires ffs?

jeez "lighten up" (sorry couldn't resist)