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Does anyone know
Shimano knows. Look up the EV for any cassette you're interested in by googling, e.g. "CS-HG500 EV PDF"
This shows the eight largest sprockets on the 11-34 are more or less permanently joined together. Making a 9-speed 13-34 would be easy, making an 11-30 would be particularly taxing in this instance because 30 and 34 are riveted to the same spider.
gbj_tester-
permanently joined together
It's not too taxing to drill the head off the rivet... Depends how much you want it!
Making a 9-speed 13-34 would be easy
Except you would need a 13T designed for a lockring (along with a lockring large enough).Apparently not. -
making an 11-30 would be particularly taxing in this instance because 30 and 34 are riveted to the same spider.
Cheers for the EV tip. It would be to make an 11-30. The picture on CRC and ^ @hamrack's video makes it look like it is just riveted together. Hopefully riveted and not pins pressed in. I don't think it would be a problem to drill them out, except maybe for the fact that the 34 on the back looks like it's offset or recessed.
hamrack
Jonny69
My ongoing gear quandries. I'm adding more gears to an older bike while maintaining the 126mm rear spacing and 7-speed Shimano freehub. I've worked out that you can fit 9 gears on the 7-speed body by using 9 of the gears off a 10-speed cassette. I just need a cassette which comes apart. Does anyone know if the 11-34 Shimano Tiagra HG500 10-speed cassette can be taken apart into separate cogs and spacers?
Edit: this one: http://www.wiggle.co.uk/shimano-tiagra-hg500-10-speed-cassette-11-3211-34/