TSDZ2 non-drive side crank binding against BB when tightened

[Peddlin' Pedro]

Apologies if this is covered elsewhere but a search didn't show anything immediately related.

On fitting the non-drive side crank to the TDSZ2 today and tightening to a (very) modest 35 N m, the crank arm bottomed out and bound completely against the unit's BB face.

Is this a known issue or have I just been unlucky and got a crank made of cheddar?

 

[peter.c]

The cranks are made of cheese and the taper is far worse than before, my last tsdz2build had to use the original cranks quality has gone to cheap and cheerful suspect the casting mould is near end of life
For latest bike have gone back to a bafang mid -drive

 

[Swizz]

Apologies if this is covered elsewhere but a search didn't show anything immediately related.

On fitting the non-drive side crank to the TDSZ2 today and tightening to a (very) modest 35 N m, the crank arm bottomed out and bound completely against the unit's BB face.

Is this a known issue or have I just been unlucky and got a crank made of cheddar?

I have replaced mine with Bafang ones for a narrower q factor, so have a pair going spare unless you take a punt on some Bafang ones too

 

[Peddlin' Pedro]

I have replaced mine with Bafang ones for a narrower q factor, so have a pair going spare unless you take a punt on some Bafang ones too

Thank you. Think I’ll grab some Bafang ones instead though. Bloody annoying as thought I’d finally get it on the road this weekend

 

[wheeliepete]

Shimano Steps E6000 arms are an alternative for Bafang mid drives, so should be good for the tsdz2.

 

[Swizz]

Thank you. Think I’ll grab some Bafang ones instead though. Bloody annoying as thought I’d finally get it on the road this weekend

Innit.
Mine is waiting for some pedals ordered on 2/8 as 'deliver to store' from Decathlon.
Grrr isn't the half of it!

 

[Gavin]

Thank you. Think I’ll grab some Bafang ones instead though. Bloody annoying as thought I’d finally get it on the road this weekend

There was another guy on here a few weeks ago with a similar problem, so you're not alone.

This suggestion is a bit brutal, but if you're desperate to get rolling this weekend you could always use an angle grinder/ flap disc and remove some meat from the back of the arm- you only need a little bit of clearance...

 

[Peddlin' Pedro]

This suggestion is a bit brutal, but if you're desperate to get rolling this weekend you could always use an angle grinder/ flap disc and remove some meat from the back of the arm- you only need a little bit of clearance...

In line with your suggestion I decided to at least get it running and check for any other issues with the unit before spending money on other parts. I put the crank in the vice and took a file to it; had to remove around 1.5-1.8mm to get adequate clearance at 35 N-m. Hoping to get it going this afternoon, if it stops raining.

Does mean it currently has a hefty NDS q-offset of around 15mm, which is pretty bad. Will need to deal with that.