Hi,

I recently bought a pair of Continental Supersonic lightweight tubes and installed them in a new pair of 23 mm Michelin PRO4 Grip tyres. (This is the first time I’ve run 23 mm tyres in quite a while. They’re predictably too narrow, but these ones certainly have impressive grip and they roll tolerably well.)
However, I’ve now suffered three punctures in maybe 300 km, all on the rear wheel. In each case, the puncture has been a pinhole on the rim side of the tube, and always aligning with a spoke. The latest hole had a 1.5 mm abrasion leading to the pinprick proper.
The rims are the originals on my Dawes Clubman. The spokes don’t appear to be poking through the rim tape, but perhaps the edges of the holes are a little sharp to the touch despite the tape. (Though I wouldn’t have worried if I hadn’t got these punctures.)
I never had a problem with these wheels before, but that might be because I’ve never used them with 23 mm tyres (and accordingly higher pressures) and super-light tubes.
Since I can’t afford not to use the tyres, is the solution a thicker tube, an additional layer of rim tape, or something else entirely?