My new chain started to slip so looking at gears, I saw the front was very worn and replaced the crank/chainset.
the cheap replacement worked well - except I didn’t spot steel material so the weight.
so I again replaced this Decathlon2449198 - CRANKSET 48/38/28 8S 170MM
https://www.decathlon.co.uk/48-38-28-chainset-silver-id_8517148.html
with this one 4096853 - CRANK SET 7/8/9V ..
https://www.decathlon.co.uk/bike-triplebottombracket-789-id_968556.html
Both triples; same; original bottom-bracket; 8 gears at back. Admittedly different numbers of teeth,
Now the problem is that my Shimano Alterus derailleur will not reach-out for the largest cog on this new one. It covers smallest & medium cogs but will not move the chain from small to medium (it will move down to smallest; and I can move it from smallest to medium by hand).
I’m reluctant to buy a new derailleur as I don’t believe that’s the problem but cannot see why the new chainset is deeper/wider; it certainly doesn’t look it !! The Decathlon chainset were stated as being Shimano compatible.
i also cannot get any slack from the cable shifter; whereas I can adjust the rear gear cable from the shifter !
any ideas appreciated - how do other people ensure compatibility please ?
thanks in advance - Mike.
the cheap replacement worked well - except I didn’t spot steel material so the weight.
so I again replaced this Decathlon2449198 - CRANKSET 48/38/28 8S 170MM
https://www.decathlon.co.uk/48-38-28-chainset-silver-id_8517148.html
with this one 4096853 - CRANK SET 7/8/9V ..
https://www.decathlon.co.uk/bike-triplebottombracket-789-id_968556.html
Both triples; same; original bottom-bracket; 8 gears at back. Admittedly different numbers of teeth,
Now the problem is that my Shimano Alterus derailleur will not reach-out for the largest cog on this new one. It covers smallest & medium cogs but will not move the chain from small to medium (it will move down to smallest; and I can move it from smallest to medium by hand).
I’m reluctant to buy a new derailleur as I don’t believe that’s the problem but cannot see why the new chainset is deeper/wider; it certainly doesn’t look it !! The Decathlon chainset were stated as being Shimano compatible.
i also cannot get any slack from the cable shifter; whereas I can adjust the rear gear cable from the shifter !
any ideas appreciated - how do other people ensure compatibility please ?
thanks in advance - Mike.