by corrado » Fri Jun 02, 2017 11:13 am
There were several issues with the later rubber valves breaking which lead to RS supplying them without valves which wasn't very helpful. Earlier ones had a bolt in valve, via 8mm hole, later had an 11mm hole, probably more industry standard. I don't recall any issues with the earlier bolt in valves and "if it ain't broke, don't fix it comes to mind". Bridport valves can be fitted to the 11mm holes but requires a bit of "fettling" to the rim to get them to fit.
Biggest problem with them is that they're a barsteward to fit tyres onto and an even bigger one to remove them. In case of worn tyres it's better to cut the old one off rather than damage the rim further trying to get them off.
The tyre technician I use has fitted hundreds of tyres to SIP rims but won't touch the scootRS ones, at least that's what I understood when he said "don't bring me any more of those f**king steel rims."