7 speed moutain bike SLIPPING on Tacx Neo 2t, help for a complete beginner

Equipment
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Hi all,

I have a hybrid bike that I am desperately trying to setup properly on a Tacx Neo 2t. The bike is 7-speed, the chain, the cassette, the derailleur - all 7-speed. I know that tacx says the unit is compatiable for 9, 10 and 11 speed. I don’t have this kind of bike.I bought a Shimano Ultegra R8000 11 Speed Cassette with my Neo because I thought this might work.

And it did. For a while, the 7 speed bike worked with the 11 speed cassette. Of course, some gears felt weird but i could actually use the trainer. Then, I tried climbing something for a long time. It was loud but the bike had just detached from the freehub. So i just fixed it on again but the chain since this ordeal keeps on slipping and sliding. The chain is holding onto the casette very poorly and keeps slipping. There’s no way i can use this trainer like this.

What are my options? Is this beyond help?

Grateful for all advice.

The bike i own: https://www.halfords.com/bikes/hybrid-bikes/apollo-belmont-mens-hybrid-bike—18in-21in-frames-566619.html

3

If it’s in the state most 7 speed hybrids are, the chain’s probably at 2% stretch (aka worn beyond all hope) - luckily 7 speed chains are dirt cheap!

3 Likes
4

I am a complete noob. Thank you so much for the advice, just ordered a 7-speed cassette and will try this out. it’s so weird… it was working OK until i climbed on the regular. Urgh. Probably f’d the chain aswell.

Thanks though wish me luck!

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i probably f’d the chain like an idiot. It was fine until i started climbing on the regular. I just bought a 7 speed cassette and will see if that works. I only discovered bike gears were a thing 2 weeks ago so i think a chain switcheroo situation cannot happen. It should be illegal for me to be able to do that to any bike.

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Yeah if you don’t have an 11 speed bike, just a 7 speed cassette and chain will fix the problem, then it should work inside and outside. You can likely sell the cassette, although it may be damaged by now.

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I’ll keep the cassette. Might need it for a nice bike in the future. Hoping my love for indoor cycling will translate to outdoors someday :smiley:

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Hi iamholland

can you clarify which side of the cassette the 4.5mm should go on?

Thanks

11

does that mean both the 4.5mm and 1.8mm are stacked together between the neo and cassette… or the 1.8m goes nearest the derailleur?

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I know this thread is old, but it was the first item returned when I DuckDuckGo’d using a 7 speed steel bike on a Tacx Neo. I have now bought a secondhand Neo from someone who needed throughaxle capability. For my first ride i had the 4.5 + 1.8 spacer between cassette and Neo, but this placed top gear too near the frame for an 11T cog. For the second ride I removed the 1.8mm spacer and that puts the cassette in exactly the right place for my first generation Shimano 105 derailleur to span the gears nicely, with perfect gear changes. This is a six speed derailleur with a 7 speed DT shifter. Tacx supply a 1mm ring to adapt a ten speed cassette to an 11 speed hub, and I think that’s interesting, and I suspect that would also work with the 4.5mm spacer.