Adjusting battery location using Wolf Tooth B-Rad

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XyloSesame   100 µW

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Adjusting battery location using Wolf Tooth B-Rad

Post by XyloSesame » Nov 07 2019 7:21pm

Anyone have experience with a battery mounted using B-Rad sliding mounting bases? I've seen it mentioned and linked, but haven't found any real-world examples or experiences.

I'm in the process of building out a Cannondale and my bottle cage mounts don't readily accommodate the Shark pack. I though about drilling the Shark mounting base as I have seen done in the forum, but instead I snagged a B-Rad to adjust the mounting position higher on my downtube. It's a clean bolt-on install, but the lack of surface area from the battery mount to the downtube worries me a bit; will this be an issue down the road?
B-Rad-Shark-Mount.png
B-Rad-Shark-Mount.png (482.62 KiB) Viewed 427 times

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amberwolf   100 GW

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Re: Adjusting battery location using Wolf Tooth B-Rad

Post by amberwolf » Nov 07 2019 10:17pm

That's more weight than those mounts were designed for, so all the side to side wiggling during pedalling, etc., is going to eventually stress the mounts if there is no other support between the base and the downtube.

However, you could add a plate between the two, if it's curve matches the tube's it'll be even better. You could do that with a 3D printer, or you can do it with Friendly Plastic or similar. Even hard-ish rubber pads might help, or closed-cell foam.

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XyloSesame   100 µW

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Re: Adjusting battery location using Wolf Tooth B-Rad

Post by XyloSesame » Nov 08 2019 2:06pm

Yeah, the shear stress is definitely what concerns me. The mount is solid, but side-to-side wiggle over time seems like it will take a toll on the mount, bolts, or both. I'd rather lose the battery than bork my frame, but avoiding any damage at all would be ... nice.

I think I'll fall back to drilling an appropriately spaced hole in the Shark mounting bracket as illustrated in many other builds. The Shark bracket comes with formed rubber fixing gaskets so it is fairly snug when installed as designed; these won't be of use in a custom install, so I'll have to Frankenstein some other shock absorption between mount and downtube.

Thanks for the feedback.

lcarron   100 µW

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Re: Adjusting battery location using Wolf Tooth B-Rad

Post by lcarron » Nov 08 2019 7:58pm

Hi,

I had the exact same problem. I found those and I print it on a 3d printer. The battery is very stable now.
Check it out.

https://www.thingiverse.com/thing:3593455

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XyloSesame   100 µW

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Re: Adjusting battery location using Wolf Tooth B-Rad

Post by XyloSesame » Nov 11 2019 10:26am

lcarron wrote:
Nov 08 2019 7:58pm
Hi,

I had the exact same problem. I found those and I print it on a 3d printer. The battery is very stable now.
Check it out.

https://www.thingiverse.com/thing:3593455
When positioning the battery this weekend, I realized I only needed to extend the existing channel to accommodate an additional 4-5mm; after drilling and using low-profile button head screws, I was able to use the spacers that came with the pack. Safe and snug.

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Re: Adjusting battery location using Wolf Tooth B-Rad

Post by 2old » Nov 11 2019 11:15am

Another thing you can do to reinforce the mount system is use a Velcro wrap or "toe strap" to anchor the battery. I do this with a Haibike even though the battery mounting system seems functionally adequate.

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