wheel building queries ???

dave8178

i recently hit a kerb (thanks to a tool in a car with very little spacial awareness :x ) and could do with replacing the rim(there were bent in pretty bad, ive tried to pull them out but cant get them right, very juddery while braking)
they are DT swiss R1900's and have a profile height of 30.3mm i believe.
i cant find any of them but i've found RR585 have the same profile.

would these work or is there any other rims that could work without changing spokes?
i've never built wheels and cant figure out spoke calcs. :shock:

any help would be appreciated

many thanks

Dave

amaferanga

You need to check the ERD of the rims - rims with the same profile can still have a different ERD. Which rim does the R1900 use - could it be the RR585? The RR585 has an ERD of 582mm. You could measure the ERD on your current rims - a quick Google should show you how its done.

dave8178

the ERD is the same by my calcs, that should work.

thank you very much.

Dave

k-dog

That'll work but if you're going to the effort of rebuilding it I would rather use new spokes - doesn't make sense to me to reuse something that is relatively cheap but very important.

Monty Dog

k-dog wrote:

That'll work but if you're going to the effort of rebuilding it I would rather use new spokes - doesn't make sense to me to reuse something that is relatively cheap but very important.

I've reused 25 year old spokes without problem - wheels were ridden on L'Eroica, so weren't exactly treated lightly. Consistent build quality is critical. Replacing nipples is more common as they can get corroded.

dave8178

i'm on a really tight budget and was only planning on replacing anything that looked knackered for now.
none of the spokes needed adjusting or show any marks on them after the crash.

cheers
Dave

2Phat4Rapha

If you are going to reuse the spokes, tape the new rim to the old one with exactly the same orientation and move the spokes over one by one. It is important not to remove them from the hub and mix them up. Also, make sure to put your thumb over the end of the spoke as you present it to the rim. Better to slice your flesh to shreds than to scratch the rim.

onbike 1939

Try to keep the spokes in the same position as you transfer them so that the angle of the bend at the hub remains the same. This is important if you want to prevent fatigue causing the spoke to fail. A smear of vaseline on the surface of the hub will help the spoke to find the correct angle.

dave8178

all these are great idea's. i was just going to take a picture and work off that.
went to my LBS today and found out the RR585 is slightly deeper than the original rim so would need new spokes. the guys there are working on getting me the same rim. not an easy job as maddison ( the uk distributor for DT Swiss) dont stock them.
this may take a while.

top tips always welcome

Cheers

Dave.

Monty Dog

No surprises on Madison, they're pretty useless at doing special orders. Try some of the German online dealers like Bike24.de or Starbike.com for DT rims, they are likely to be cheaper too and postage from Germany is quick and cheap.

amaferanga

dave8178 wrote:

all these are great idea's. i was just going to take a picture and work off that.
went to my LBS today and found out the RR585 is slightly deeper than the original rim so would need new spokes. the guys there are working on getting me the same rim. not an easy job as maddison ( the uk distributor for DT Swiss) dont stock them.
this may take a while.

top tips always welcome

Cheers

Dave.

What is the ERD of the original rim then? Didn't you say you knew what it was and it was the same? You might be able to find a suitable alternative with the same ERD (e.g. IRD Cadence Aero has an ERD of 576mm)

hoojammyflip

IRD Cadence Aero is same rim as Aerorage, allegedly, both made by Kinlin. Aerorages are about GBP25 if you look about. Spokes can be bought from Cyclebasket for about 8 quid for 40...ACI DB. So you could do the wheel for less than the cost of the DT rim. Get onto Sheldon Brown's (RIP) website and check out the wheelbuilding section.

I heard that DT use Swiss cheese for their rims....might be an idea to start thinking about different rims to DT, retaining only the DT hub and skewer. After all, DT hubs are what they're known for (formerly Hugi) and DT spokes...their foray into rims is relatively recent. Not all aluminium is the same (obviously).

amaferanga

hoojammyflip wrote:

IRD Cadence Aero is same rim as Aerorage, allegedly, both made by Kinlin.

Not quite. The IRD Cadence is the same as the Halo Mercury, allegedly. The Aerorage is a 25mm rim, the Mercury and Cadence Aero are 30mm rims.