9sp to 11sp for Smart Trainer

parmos

Right Guys,

i have a Kickrcore Smart trainer at home which i has a 105 11sp cassette on question is i have a old Hybrid bike which i am going to use on the Kickr instead of my 11sp roadie but its only a 9sp obv i don't require the rear wheel only the front crank and chain is this just a case of changing the front chainrings over with a new chain to a another shimano 11sp

Cheers

Onegear

If you are just popping on the 9 speed hybrid with nothing removed but the rear wheel, all you need to do is to install a 9speed cassette on your smart trainer.

whyamihere

If you're planning to use the hybrid instead of the road bike on the Kickr, the easiest thing to do is just to get a 9 speed cassette and fit it onto the Kickr. If you're planning to have the hybrid on there permanently, you could just use the cassette currently fitted to the rear wheel. You'll need a 1.85mm spacer on the freehub. The Kickr may have come with this, if not they're readily available, like this one: https://www.wiggle.co.uk/lifeline-rear-hub-cassette-spacer-11-speed-to-10-speed

parmos

Onegear said:

If you are just popping on the 9 speed hybrid with nothing removed but the rear wheel, all you need to do is to install a 9speed cassette on your smart trainer.

whyamihere said:

If you're planning to use the hybrid instead of the road bike on the Kickr, the easiest thing to do is just to get a 9 speed cassette and fit it onto the Kickr. If you're planning to have the hybrid on there permanently, you could just use the cassette currently fitted to the rear wheel. You'll need a 1.85mm spacer on the freehub. The Kickr may have come with this, if not they're readily available, like this one: https://www.wiggle.co.uk/lifeline-rear-hub-cassette-spacer-11-speed-to-10-speed

i have got a spare 9sp cassette anyways just ideally wanted a 11sp on it as that's what i've been used too, i have got spanners etc to swap them over just wanted to know whether it was worth changing the front chain rings that's all but by the sounds of it, it isn't

Cheers

whyamihere

To get the hybrid shifting correctly on an 11 speed cassette, you'll need a new rear shifter and a new rear mech, and an 11 speed chain to mesh with the cassette properly. The front isn't really relevant. You can't just use 9 gears from the 11 speed cassette, the spacing between cogs is different.

MattFalle

front chain rings will be fine but as above you'll need a new shifter and rear mech and chain.

just use the 9 speed stuff.

Onegear

The constraint is the shifters and derailleurs. You may be able to get by with chainring compatibility but at the core you will need to change nearly the whole groupset for 2 more speeds.

MattFalle

2 more speeds that don't really make a difference on a turbo or, some may, on the road....