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got CRC to build my son some wheels hope pro 4, spank oozy 295 rims, DT rev spokes. This comes to 1727g. The wheels are 1860g. if you input DT comps you get 1819g. even for their error of +/- 5% and error in the rim they seem excessively heavy for the rev spokes. not got a caliper to measure them.
Aren't you assuming that the quoted weights are accurate for two hubs and two rims? Isn't that more likely the source of the discrepancy than the spokes? Have you accounted for any QRs, rim tape, etc?
no rim tape, weight of hubs correct for axle caps. used a couple of calculators and they all come in around the same weight. even accounting for variance the 130g difference seems excessive. I added 5% for everything and its still under what it currently weighs. of course I could be extremely unlucky and everything is 10% heavier 🙁
Have you actually weighed the component parts though?
The spokes are very unlikely to be much out, they're the lightest part of the setup. All the Revolutions I've had have been about the claimed weight (bearing in mind the claimed weight is for 264mm spokes).
When you say "this comes to 1727g", what do you mean? Using whose figures? What nipples? What length spokes?
Nothing ever weighs the sum of the claimed weights of the component parts, indeed they rarely weigh the sum of the actual weights of the parts, as you don't weigh the oil on the nipples, or the spoke freeze, or whatever.
not weighed component parts I just thought 130g difference was excessive using the DT swiss calculator compared to what I've got. I've clearly lucked out on the weight variance. if you add 10% to everything you get 1876g compared to the 1860 I've got.
I used it to get the spoke length for my Pro4's Arch MK3's and it was within what I'd consider a reasonable range, though admittedly I ending up using Sapim D-Lights rather than SuperComps I used on the DT calc, but from what I can gather they're basically the same weight wise. I would imagine it's the rims/hubs that are heavier, especially if you used claimed weights, pretty sure Hope's are with XD driver which is a smidge lighter than the Shimano one. Also worth bearing in mind the stock DT calculator uses alloy nipples, unless you got CRC to spec the same I imagine they used brass, which would add 50-60g without too much bother.
Corrected for the brass pro nipple CRC used
Complain and send them back.
The Oozy Trail 295 rim weight went up a lot in 2016 or 2017. DT Swiss are probably listing the old weights.
From memory, DT Swiss don't quote the weights for anything that isn't a stock DT Swiss component. Anything that isn't DT you have to input manually. It's useful as a guide, but I wouldn't get too hung up about it tbh. If they are well built and are made using the components that you think you have paid for, then don't worry about it. It is what it is.
DT can only really take responsibility for the weight of the spokes and nipples they make, and the acccuracy of the addy up of weights you’ve inputted. Manufacturer quoted figures are notoriously optimistic which is why you should always measure the parts you actually have for wheel building rather than use quoted ERD etc.
If your wheelset is 130g more than you expected, that extra weight over quoted is probably mostly in the hubs and rims, your complaint is probably more with Hope and Spank than CRC or DT.
It'll be the rims.
When I've built wheels I always weight the components, spokes and nipples come up bob on what DT say they will. Stands to reason they are working with very tight tolerances to form a spoke from a very accurately measured amount of steel wire or whatever it is they use.
Hope hubs normally come up around 180 for a front and 310 for a rear hub depending on end caps but not that much variance. XD driver is 13g less than a shimano one.
I've weighed components. Hubs & spokes close to listed. Rims can be way out. Have read on here that superstar rims are way above list weight.
"The Oozy Trail 295 rim weight went up a lot in 2016 or 2017"
yeah about 30g heavier than my 2015 wheelset rims. I'll be blaming spank given the tolerances that hope machine their products too.
relax man, it's your scales that are out / the wheels really weigh 1650g's
now go enjoy em
lol if only plus they aren't for me but my son.
Aren't revolution spokes double butted, and the comps constant diameter?
If yours taper in the middle from the ends, then they're revs. If they are one size all the way along, they're comps.
Aren’t revolution spokes double butted, and the comps constant diameter?
Err, no.
DT Comps are doublebutted. DT Revs are also DB but moreso so lighter. DT Champs are plain gauge.
Id be checking for a steel freehub if its a shimano pro4
DTs calculator frustratingly defaults to 28h, and sometimes reverts back to 28h even if you notice and set to 32h.
"Id be checking for a steel freehub if its a shimano pro4"
out with the magnet tomorrow then lol
I'd be very unlucky if it was to be a steel freehub given they come with alu ones in the box
wrong spokes. top measure 2mm middle measures 1.8mm on the front wheels
rear has straight guage 2mm spokes on the disc side and 2.0mm - 1.8mm on the drive side
Whoops!