I’ve ignored it for far too long but I only have a tiny amount of clearance between the non-drive side stay and my Tacx Neo trainer… Eventually I’ll be on a new bike and hopefully won’t have this issue but anyone else have this kind of tight fit?!
Mine’s not that tight, but I do find that I can’t use first gear without the derailleur hitting the leg on my Flux. I forget every now and then and have to get off the bike to un-jam! My bike is only a couple of years old.
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When Travelling for work, I’ve borrowed an Elite Direto, which I can only use in my Highest gears without the derailleur cage colliding with the trainer. I’m running Shimano 11-33 in the back with ultegra. In the highest gears, at least this trainer is very inconsistent.
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First-gen Flux had that bug with long-cage derailleurs. They fixed it on Flux S and Flux 2. It’s still tight - derailleur is right onto the trainer in the lowest gear, but at least there’s room for a longer cage.
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Gen1 neo, I have to detach the rear disc brake from the frame. Good thing it doesn’t leave the basement much.
yeah, gen1 neo. I think I’ve worn a bit of the trainer away in that area, but generally not a problem for me.
What bike is that? Need heard of clearances being that tight.
The Neo has fit issues with many bikes. I have some close ones (2012 Roubaix rim brake) and it’s quite common to see chainstay and disc brake caliper contact on other bikes. Tacx has sent additional spaces to many of the users with issues. It’s seen a bunch in the Tacx Neo FB group.
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Tacx makes some shims to put in there. Garmin Tacx Indoor Bike Trainers S2800.01
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If you add spacers on the left side, what happens on the right side? Anything that can be taken out?
Not totally sure, but all I have seen reported is adding spacers to the left (nothing mentioning a change to the right, and seems unlikely to change without messing up the connection to the freehub and cassette alignment).
Presumably it just places the axle width wider… which is open to interpretation and speculation as to the consequences and related frame design/materials 
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Blockquote[quote=“kevstraining, post:7, topic:38398, full:true”]
What bike is that? Need heard of clearances being that tight.
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Cannondale SuperSix EVO
I’m hesitant to add spacers… the drive side is lined up perfectly… only thing spacers would do is stretch the non-drive side carbon stays wider.
- Yup, so it’s that or tight frame to trainer spacing (with potential contact during flex?).
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Yeah anytime I’m doing any hard sprints I’ll hear/feel that side knock/rub a little bit… I might just wrap that seat stay in some rubber to protect it from rubbing more.
Until I N+1 happens again… it’s inevitable.
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Nothing happens to your right side. It spreads the rear stays out a tiny bit more. These flex a bit anyway and you’re not moving it out a hole lot. The bike is made to do this as there is no guarantee your wheel is 130mm wide. Rather than the spread, the bigger concern is the alignment of the dropout to the hub, which will be a tiny bit off. Again, there’s enough play in there for this exercise.
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My Canyon Ultimate won’t fit on my 2016 Wahoo Kickr, if you tighten the quick release you would crush the non drive side stay.
As others have mentioned neo for me, no issue with emonda rim brake but my Domane disc is extremely close to the caliper. Works but super close.
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