Sorry if wrong forum but I didn't put this in the mechanics spot because it wasn't about fixing a bicycle.

I have recently bought a Niner RLT9 and intend to purchase a used Checkpoint with 2 sets of wheels. I need to know all the specifications to check to make sure the wheels on the Checkpoint will also work on my Niner RLT9.

All I know is that both are 12X142 and 12X100 thru axel in 700c. What else do I need to know to determine compatibility? The Niner will also fit 650b, not that I think that matters here.

The wheels should be fine.

Brakes might drag if the rotor spacing tolerance is different enough between the wheels. Fix for this on hydraulic is to push the pistons around, on cable it's dialing in the adjusters.

You need to set up frames and rotors for matching rotor sizes if they are not already.

Same goes for cassettes. Derailleur might need adjustment

The frames may take different thru axle length or threading

12x100 & 12x142 is about all you need... not mtb, then Boost' isn;t a consideration.

there may be a variance in the rotor size front 180 or 160, but depending, the Niner will work with both, checkpoint probable, not sure.
You may have to readjust the brake caliper position when swapping wheels, due to very small rotor placement or thickness variance ...
A slight rubbing issue is often handled with loosening the bolts holding the entire caliper unit to the fork or stay, clamping the brake lever down tightly to have the pads firmly gripping the rotor and then re-tightening the caliper body bolts... - should re-center the rotor within the pads properly...
Ride On
Yuri

Thanks. What's the deal with the different types of disc attachment? I can't even find the info now but was looking at something earlier about 6 bolt VS some other type that goes on with something like a cassette lock ring. The Niner looks like it is the cassette lock ring type.

6 Bolt versus Shimano CenterLok. The Shimano uses the tool that’s the same as the cassette lockring. CenterLok is possibly more popular on road disc wheels, 6 bolt is common on mt bike. Both work equally well, though 6 bolt you want to occasionally check bolt tightness. I have 2 sets of wheels for my gravel bike, one is 6 bolt, one is Centerlok, I can swap with no adjustments needed.

Appreciate it. That's the info I've been looking for all day. I don't even mind making some adjustment, but I couldn't figure out if both types of disc attachment would fit on the Niner.

The spec’s for the wheel should indicate 6 bolt or CenterLok. Thats a function of how the hub is built.

If I remember right, the rear wheels on earlier Checkpoints don't have standard offset, and you need to adjust the spokes to center the wheel if you use it on another bike.

That's good info but it shouldn't be an issue here. I'm buying the Checkpoint with 2 sets of wheels. I intend to make the extra set of wheels specific to the Niner RLT I just bought.
I'm setting up 2 gravel bikes for me and my son. He is the same size as me currently. The draw for this particular deal for me was the ability to have 2 sets of wheels with my Niner since I will be riding road as well as light gravel. My son will only be riding light gravel on the Checkpoint.