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Morning all,
I built up an On-One Inbred for my son's 10th birthday present earlier in the year, running a 32T chainring and an 11-36 Shimano HG50 cassette.
Being as it's a steel frame, and he is only 10, he's finding it just a bit of a struggle on some of the climbs we ride, so I thought I might get a 40T range extender from Superstar or Uberbike to go in his Christmas stocking.
Question is, can I easily fit this with the HG50 cassette? I'm assuming I'd take out the 17 tooth sprocket, but can this easily be removed? From memory of fitting the cassette, I think this is in the block, rather than a loose sprocket, but I assume there's nothing to actually stop me from carefully taking the block apart and then reinstalling it as individual sprockets and spacers?
Some models are bolted together (2mm hex IIRC) these are easy to dismantle.
Some have long rivets, you'll need to bang these out (hammer and punch, or a dremel to take the head off).
If you have a steel cassette body, you can just sling the sprockets and spacers on individually, if it's an aluminium body, i'd be careful. But if he is only 10, it's really really unlikely to be an issue. Just make sure the lockring is tightened properly.
30t n/w chainring half way there and less faff?
When I got the 32t, it was the smallest I could find that fitted onto Zee cranks, but to be fair to him, he might only be 10, but he get plenty of use out of 32x11, so I doubt I'd be popular for making him spin more at that end of the cassette! 😆
You're a bad parent for making him lug round a HG-50, for starters. As above though, it's all pinned isn't it? o would be a PITA the separate and you'd have make sure it was all tightly done back up or it'd be reet rattly
for not a lot more than the proce of a range extender you can get a 10spd 40 tooth cassette (sunrace) - if you're running 10spd that is
Check the carrier for the sprockets, I once tried to fit a ratio expander to a cheaper cassette only to find it wouldn't work due to the cassette having 5 'arms' whereas the expander sprocket only had 4, meant the expander wouldn't sit in line. Maybe take it to a lbs and get them to see if one will fit first?
Do the decent thing and give him your xt cassette.
He's not having my XT cassette! 😆 Wouldn't get him much further forward though, as I'm happily running 2x10.
I'll take a look at the Sunrace cassette though.
Dremel the rivet heads off, re-stack the cassette and spacers as you want...