Befang Ultra- Chainring, Spider Options?

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Flash-FX   10 mW

10 mW
Posts: 30
Joined: Mar 09 2019 9:59am
Location: South Jersey

Befang Ultra- Chainring, Spider Options?

Post by Flash-FX » Mar 09 2019 10:35am

Is everyone running the Ultra drives with the stock provided 44T stock steel chain rings? And how about the stock steel chain ring spider. Anyone know if there is a aluminum version available? A 32-34T 104 BCD is something I could use. Just trying to be a little more realistic with the gearing and the weight.

Flash-FX   10 mW

10 mW
Posts: 30
Joined: Mar 09 2019 9:59am
Location: South Jersey

Re: Befang Ultra- Chainring, Spider Options?

Post by Flash-FX » Apr 11 2019 8:08pm

Ok, since there are none commercially available yet (Luna Cycle?), I had to make my own. The lower gearing really helps in off road conditions. Also reduces current draw. Here are a couple pictures (also posted over on my fatbike build).
Attachments
IMG_5034.jpg
The front side, 34T
IMG_5034.jpg (214.08 KiB) Viewed 266 times
IMG_5035.jpg
The back side
IMG_5035.jpg (198.15 KiB) Viewed 266 times
IMG_5032.jpg
The same offset as the stock 44T sprocket
IMG_5032.jpg (154.21 KiB) Viewed 266 times

Ishtar_Cinline   1 µW

1 µW
Posts: 3
Joined: Nov 06 2018 3:22am

Re: Befang Ultra- Chainring, Spider Options?

Post by Ishtar_Cinline » Apr 12 2019 7:14am

Hi i was looking for good chainring option, i'm using 40T that bafang provide now want to make it at least 36T. Where did you got your chainring, is it strong enough for the motor :o

Ishtar_Cinline   1 µW

1 µW
Posts: 3
Joined: Nov 06 2018 3:22am

Re: Befang Ultra- Chainring, Spider Options?

Post by Ishtar_Cinline » Apr 12 2019 7:15am

Hi i was looking for good chainring option, i'm using 40T that bafang provide now want to make it at least 36T. Where did you got your chainring, is it strong enough for the motor :o

Flash-FX   10 mW

10 mW
Posts: 30
Joined: Mar 09 2019 9:59am
Location: South Jersey

Re: Befang Ultra- Chainring, Spider Options?

Post by Flash-FX » Apr 12 2019 8:04am

Ishtar_Cinline wrote:
Apr 12 2019 7:14am
Hi i was looking for good chainring option, i'm using 40T that bafang provide now want to make it at least 36T. Where did you got your chainring, is it strong enough for the motor :o
The standard supplied Bafang chain ring has 5 arms, or 130 BCD. The 130BCD 38T ring is the smallest one you can get to fit your setup. The chain ring I made is a 4 arm, 104 BCD, to accept much smaller sprockets. These are plenty strong. Sounds like you need one too. Sorry, I am not making any more.

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