whats the best strongest cheapest m mounts?

[kalebludlow]

He does sell adjustable crossbars now

[MauveMaverick]

@jonisingt35r

have tb 218mm 63 motors reverse mount

I take it as you already have tb218’s you are no longer interested in mine?

[Movation]

I make my own from M4 treaded rod a few nylon loc nuts and a blue anodised stainless drinking straw.

[mtsmithies]

Is there some problem with using the idler? Curious why you recommend going without it.

[b264]

Adds more things that can fail, wears out belt from both sides instead of just one side, isn’t really needed if you set up and align the belt correctly.

@b264

Alignment – the best way I’ve found to perfectly align belts is

• get motor mount (without motor) snug on hanger, then loosen a tiny bit so it moves
• install wheel and pulley with no speedring (washer) between the hanger and inner bearing.
• push motor mount flush up against wheel pulley so they are touching each other
• keep those held tightly together while you tighten motor mount clamps
• make sure mount is flush against, and touching, the wheel pulley, and there is no gap or misalignment
• finish tightening mount clamp all the way
• make sure again that mount is flush against, and touching, the wheel pulley, and there is no gap or misalignment
• when you’re all done, take the wheel and pulley back off, add a single 1mm speedring (washer) and just like that, the pulley will be perfectly aligned and 1mm away from the motor mount plate
• if you need it further away when you are doing tensioning, then add more washers

And also make sure your pulleys are concentric and don’t wobble at all as @taz mentioned. That’s super important.

[Movation]

I use to think like that but then I tried them. Loose belts that don’t slip is like magic. They are not for everyone it is another part that needs servicing even if you don’t use the idlers, the idler mounts are longer does makes reversing them simpler.