Skizz
10 µW
- Joined
- Jun 15, 2020
- Messages
- 5
Hi all,
I'd be grateful for thoughts on non-destructive mounting of battery packs on the Yuba Mundo downtube.
We've a brand new Mundo V5 frameset on which I need to mount a 17.5Ah Hairon (shark style) pack. It's a heavy pack that needs good support (3-4 point) but being a new frame I can't just insert additional rivnuts like I did with our Ute without invalidating the warranty.
The factory bottle-bosses line up roughly with additional holes I drilled in the alloy portion of the battery's mounting plate but this would leave the top half of the pack completely unsupported; not ideal, and instability aside, a decent side-hit or fall could easily tear the rivnuts clean out.
Solutions like Grin Tech's 'Triple Bob' look good but I hadn't reckoned on the Mundo's MASSIVELY ovalised tubes. I'm not convinced that strapping something to these with hose clamps would be effective or particularly safe, with there being a fair chance of the clamps crushing the downtube across its section when tightened enough to adequately fix the adapter plate. Likewise, this ovalisation also poses a risk of top-to-bottom crushing if using u-bolts or similar.
Key considerations:
- It's a heavy pack that needs good support
- Brand new frame so warranty must be preserved with non-destructive solutions
- Heavily ovalised tube sections would cause significant point-loading if hose-clamps used; can't overstate the level of ovalisation here, it really is nuts!
- Ovalisation also increases risk of crushing top-to-bottom if u-bolts or similar used
- Attachment should be secure and not look temporary as bike will be left outside schools and shops for extended periods
So, have at it! What's worked for you on these frames? Thanks in advance
I'd be grateful for thoughts on non-destructive mounting of battery packs on the Yuba Mundo downtube.
We've a brand new Mundo V5 frameset on which I need to mount a 17.5Ah Hairon (shark style) pack. It's a heavy pack that needs good support (3-4 point) but being a new frame I can't just insert additional rivnuts like I did with our Ute without invalidating the warranty.
The factory bottle-bosses line up roughly with additional holes I drilled in the alloy portion of the battery's mounting plate but this would leave the top half of the pack completely unsupported; not ideal, and instability aside, a decent side-hit or fall could easily tear the rivnuts clean out.
Solutions like Grin Tech's 'Triple Bob' look good but I hadn't reckoned on the Mundo's MASSIVELY ovalised tubes. I'm not convinced that strapping something to these with hose clamps would be effective or particularly safe, with there being a fair chance of the clamps crushing the downtube across its section when tightened enough to adequately fix the adapter plate. Likewise, this ovalisation also poses a risk of top-to-bottom crushing if using u-bolts or similar.
Key considerations:
- It's a heavy pack that needs good support
- Brand new frame so warranty must be preserved with non-destructive solutions
- Heavily ovalised tube sections would cause significant point-loading if hose-clamps used; can't overstate the level of ovalisation here, it really is nuts!
- Ovalisation also increases risk of crushing top-to-bottom if u-bolts or similar used
- Attachment should be secure and not look temporary as bike will be left outside schools and shops for extended periods
So, have at it! What's worked for you on these frames? Thanks in advance