… I have experienced first hand how much nicer light(er) wheels are to ride with.

So…
anyone happen to know the weight of the following?
~ Hope Hoops with Flow Rims and any gubbins needed for tubeless
~ Hope ProIIs with DT5.1 and tubeless kits
~ Hope ProIIs with DT5.1 and tubes (bog standard XC tubes)

The easy way is to switch to light-weight tyres and tubes. Makes a real difference and at sensible money.

APF

If tubeless is weight saving or not depends on what tyres you like to run.

Quite burly wheels suggests burly tyres?

Just Riding Along will probably have your answers.

I weighed my Hope hoops with Flow rims, 20mm front was 950g and qr rear 975g. Flow rim strips were about 100g and the massive schwalbe non ust big betties are 750g. These are the lightest big tyres and wheels I have tried and they are ace. The bb tyres are not the best when wet but for the current dry conditions I am happy.

The easy way is to switch to light-weight tyres and tubes.

Fine in practice but I'd also have to stop riding like a stoned rhino.

Thinking about my question again (now I've had a coffee)… it boils down to:
What's the weight difference between a Flow rim and a DT5.1?
What's the weight difference between a rim strip and a tube plus rim tape?

Both of which should be easy to find out.

yes both are very easy to find out.

have another coffee and off you go…

If you are looking at flows, and the riding they are required for, i would not worry about the weight.

It's not just light-xc bikes that benefit from low weights.

I have a set of 4.2's, supprisingly they have yet to fold despite spending more time in the air than any of my other wheelsets (sandy cutting at swinley is just too tempting 🙂 )

Stans flow = 470g

DT 5.1 = 530g

For what it's worth I used to run 5.1s and now run Flows and am much happier- easier to get the tyre on, and harder to ding. I think they're a smidge wider but am not certain.

I run them with Bontrager Rhythm rim strips which are only £4 and find these better than both the Stans and DT solutions. A rim strip and valve is 35g, and the sealant is about 40g. Standard inner tubes are around 180g each.

http://www.pedalon.co.uk/acatalog/bontrager_rimstrip.html

http://www.stif.co.uk/gear/select_options.asp?productID=7220

If you are looking at flows, and the riding they are required for, i would not worry about the weight.

It's not just light-xc bikes that benefit from low weights.

Exactly – I'll want to ride them up the hill as well as down and need all the help I can get.

SpokesCycles – excellent info. Ta.

I weighed my Hope hoops with Flow rims, 20mm front was 950g and qr rear 975g

Really, a rear wheel with a cassette is only 25g heavier than a 20mm bolt through front wheel? That's incredible if it's right. Surely a rear hub alone is heavier than a front 20mm bolt through.