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Just wondering if spokes come in aluminum. Or are they always steel? And when relacing, how come bike shops do not re use old spokes but want you to buy new ones? Also wondering if anyone has ever tried using mountain bike disk hubs and laced them to a set of road rims.....been thinking of trying this out.
 

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Just wondering if spokes come in aluminum. Or are they always steel? And when relacing, how come bike shops do not re use old spokes but want you to buy new ones? Also wondering if anyone has ever tried using mountain bike disk hubs and laced them to a set of road rims.....been thinking of trying this out.
Spokes are almost always stainless steel. There are titanium ones but their use is very rare.

Wheelbuilders (for profit wheelbuilders) will almost never re-use rims or spokes as they do not know what trauma or fatigue those parts have suffered. This would affect any warranty. Bent rims and gummed up threads affect building time. Old rims and spokes are re-used quite often by home wheelbuilders as time and warranty isn't an issue.

I'm sure lots of 700c road rims have been built on 135mm disc hubs.
 

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Mavic makes Zicral spokes, which are aluminum. They are also very thick and require special hubs and nipples.

Spokes for regular hubs and nipples are most usually steel, in some rare cases titanium, never aluminum. They would break in an instant.

Disc hubs and road rims? Why not, but why would you?
 

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Just wondering if spokes come in aluminum. Or are they always steel? And when relacing, how come bike shops do not re use old spokes but want you to buy new ones? Also wondering if anyone has ever tried using mountain bike disk hubs and laced them to a set of road rims.....been thinking of trying this out.
No aluminum spokes for standard hubs. There are wheels that use AL spokes but the hubs are designed to run them.

With standard parts, the hubs do not care what type of rims are laced to them. This is like asking if you can wear baggy shorts with road shoes. Do it if it suits your needs.
 

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I9 also offers hubs that work with their aluminum spokes.

As far as a road rim on mtb disc hubs, what is your application. You can run 700c rims and road tires (like 23, 25, 28's) on a 26er mountain bike as a commuter setup. You can obviously do this as well on a 650b and 29er frame. Many road rims are too narrow for full size mtb tires, though the trend of wider rims is happening on road bikes too so this is becoming less of an issue. If you are looking at building wheels for a disc Road or CX bike, make sure they use 135mm rear dropout spacing. Many still use 130mm spacing even with disc brakes.
 
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