For 40g - I think I'd probaby not bother with the carbon option

Jimmy - bike is a Norco Six so it's fame is hefty as are the Sun Blackeye Rims it runs, tyres are Kenda Nevegal DH

I've heard of a good few carbon DH bar failures too

Tyres... I've got a single ply Minion up front and a semi slick Highroller on the back, it's really fast rolling but still grips like DH rubber. I'll probably swap to a regular Highroller, for the Winter, soon. As for the rest of the bike I'd just replace parts with lighter stuff as it wears out.

Looks like someone else is going down the same route.

Never tried those. I put on my old schwalbe smart sams but I would not recommend them for off road, just v fast for a knobbly on road. And hilarious in gloopy mud

I'm tempted by the Geax Barro's meself...

Have run Geax datura's - lower rolling resistance but front felt very vague, ok as a rear FR tyre tho..

Demonix wrote (see)

Am currently running with truvativ holzfeller dh bar - it's a good bar and relatively light, would I gain anything by replacing it with a Easton EC70 CNT DH bar - is the carbon bar much lighter and would it be  as strong?   - want to lighten bike as it's a 37lb beast and make it a tad more chuckable but don't want to compromise the strength of the componentry.

37lbs is a bloody good weight for a DH bike!!  My Glory is 45 1/2 lbs after a bit of a diet

I'm not a fan of carbon bars, I've seen a few people not enjoying themselves as a result of them snapping.