Replacement TSDZ2 chainring

[xander02]

Hi, I have installed the TSDZ2 motor as a single speed set-up. The stock chainring is 42t. The chain-line isn't perfect, its slightly offset from the rear gear. The stock chainring is not flat but is slightly offset towards the centre which i believe must be designed to reduce the chain-line displacement.

I would like to replace the chainring to 44t, however if I purchase an "off the shelf chainring" it is flat and not built with an offset, this means it will put out the chain-line even further.

I believe it is possible to purchase the TSDZ2 on some websites and possible to chose different sized chainrings.

Does anyone know where I can purchase these chainrings separately?

Thanks

 

[Nealh]

No chain rings but PSWPower sell the spiders for standard chain rings to fit the Tongsheng.
http://www.pswpower.com/peng/iview.asp?KeyID=dtpic-2017-84-GGTT.3RWAR

 

[xander02]

No chain rings but PSWPower sell the spiders for standard chain rings to fit the Tongsheng.
http://www.pswpower.com/peng/iview.asp?KeyID=dtpic-2017-84-GGTT.3RWAR

Thanks but unfortunately these spiders have the same offset as the stock mount. I need an actual offset chainring.

 

[Grigoriy]

I couldn't find any dished chainring other than stock 42t chainring which come with the motor. Even those who sell different size chainrings for TSDZ2 on Aliexpress for around £20 actually sell standard flat 110bcd chainrings.
Anyway I think that TSDZ2 with single speed is not the best combination possible because if you want to go fast with small sprocket on the back wheel you'll have to put a lot of stress on the motor from the start.
I personally have TSDZ2 setup with 50t flat chainring:

https://www.sjscycles.co.uk/chainrings/compact-chainring-steel-110mm-bcd-5-arm-silver-50t/

And Shimano Nexus 3 speed hub with 18t 10mm offset sprocket :

http://www.forgecustomcycles.com/custom-build-your-own-electric-motorised-bikes/product/62-offset-sprocket-18t-10mm/category_pathway-12/related_product-519.html?limitstart=168

I found this combination is the best possible for single speed bike frame

 

[xander02]

I couldn't find any dished chainring other than stock 42t chainring which come with the motor. Even those who sell different size chainrings for TSDZ2 on Aliexpress for around £20 actually sell standard flat 110bcd chainrings.
Anyway I think that TSDZ2 with single speed is not the best combination possible because if you want to go fast with small sprocket on the back wheel you'll have to put a lot of stress on the motor from the start.
I personally have TSDZ2 setup with 50t flat chainring:

https://www.sjscycles.co.uk/chainrings/compact-chainring-steel-110mm-bcd-5-arm-silver-50t/

And Shimano Nexus 3 speed hub with 18t 10mm offset sprocket :

http://www.forgecustomcycles.com/custom-build-your-own-electric-motorised-bikes/product/62-offset-sprocket-18t-10mm/category_pathway-12/related_product-519.html?limitstart=168

I found this combination is the best possible for single speed bike frame

Fantastic! This is just the information I needed. Are you getting good chain alignment even though the main chainring isn’t dished?

 

[Grigoriy]

It's good enough about 1-2 mm difference. I use bmx chain with it without any problems. The only thing you have to take care when you install that sprocket is do it as Sheldon Brown says:
"After re-installing the sprocket, it is a good idea to seat the circlip by going around it and tapping it lightly with a hammer and punch. "
Otherwise the circlip can pop out because of dished sprocket and much bigger side force.
I personally use Sram circlip. I found them a bit stiffer.

 

[fico99]

I couldn't find any dished chainring other than stock 42t chainring which come with the motor. Even those who sell different size chainrings for TSDZ2 on Aliexpress for around £20 actually sell standard flat 110bcd chainrings.
Anyway I think that TSDZ2 with single speed is not the best combination possible because if you want to go fast with small sprocket on the back wheel you'll have to put a lot of stress on the motor from the start.
I personally have TSDZ2 setup with 50t flat chainring:

https://www.sjscycles.co.uk/chainrings/compact-chainring-steel-110mm-bcd-5-arm-silver-50t/

And Shimano Nexus 3 speed hub with 18t 10mm offset sprocket :

http://www.forgecustomcycles.com/custom-build-your-own-electric-motorised-bikes/product/62-offset-sprocket-18t-10mm/category_pathway-12/related_product-519.html?limitstart=168

I found this combination is the best possible for single speed bike frame

Thank you for this great feedback. I installed a TSDZ2 recently on my 2005 Gary Fischer Tassajara mountain bike with 26" wheels and my pedal cadence is too high, so was thinking to replace the 42T stock chainring with a bigger one. I used to have a 22T, 36T, 44T in the front and I have a Shimano LX 9-speed in the back. I am currently riding mostly in 7th, 8th and 9th gear only (riding more on the streets than off-road). What chainring size would you recommend so that I will use my other gears as well? 44T, 46T, 48T, 50T or 52T?

 

[wmqu999]

I am new to the site. But I was able to get a 44T chainring from Aliexpress for the TSDZ2. It has the same offset as the standard 42T chainring.

 

[Weldinpatt]

on my Pashley Tongsheng 5speed X-RD5 (w) keep 42t chainring and reduce teeth number at the rear. Woosh void warranty if the end user fits a larger chainring than 42t there are loads of sprocket sizes 13t - 22/24t, that will make it harder to pedal and go faster too , i place hill climbing ability before top speed so run a 24/42 giving me a reckless 1.75;1 primary ratio, chainline is very good as is, though i am toying with reducing the chainring, gearing down even more. "not normal" i hear, well yes but i'm a real weed, disabled following an illness. you know when your going up hill (a cadence of between 45 and 50 rpm) yet so slowly you loose balance , that's the time to stop gearing down. be interesting to watch the effect all this gearing down will have on the hub.

 

[6511iain]

I am new to the site. But I was able to get a 44T chainring from Aliexpress for the TSDZ2. It has the same offset as the standard 42T chainring.

Hello - I am after a 44T as well - can you post a link to the one you bought please. Thanks

 

[wmqu999]

Here is where I got the 44T chainring. I am hoping someone makes a 48T ring that is offset like the stock one.

11.7￡ 28% OFF|Tongsheng Chain Ring 36t | Tongsheng Tsdz2 | Chain Ring Set | Tongsheng 38t - Electric Bicycle Accessories - Aliexpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

 

[6511iain]

Here is where I got the 44T chainring. I am hoping someone makes a 48T ring that is offset like the stock one.

11.7￡ 28% OFF|Tongsheng Chain Ring 36t | Tongsheng Tsdz2 | Chain Ring Set | Tongsheng 38t - Electric Bicycle Accessories - Aliexpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

Thanks - is it offset like stock? Plus I assume I'll need an adaptor as well if replacing the original 42t. Thanks

 

[wmqu999]

This has the same offset as the stock chainring. It is a direct replacement.

 

[6511iain]

This has the same offset as the stock chainring. It is a direct replacement.

great

 

[peter.c]

You need to double check have tried from several different sellers, none have had the same dish some no dish at all

 

[tcdoe]

Hi All,
In case anyone's still looking, I found a 50 tooth chainring with 10 mm offset specifically designed for the TSDZ2, at Eco Cycles (link here). I've ordered one, will try out and post back here.