Sur-Ron - New Mid drive Bike

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Hawaiiguy   1 mW

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Re: Sur-Ron - New Mid drive Bike

Post by Hawaiiguy » Jan 20 2021 11:09pm

I couldn’t find the foot brake kit but a lot of my Surron buddy’s could use that feature

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efMX Trials Electric Freeride   1 MW

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Re: Sur-Ron - New Mid drive Bike

Post by efMX Trials Electric Freeride » Jan 21 2021 12:02am

like a new born babe and not yet listed in
this giggle world;)??? https://ebike.ntc-tech.com
some ride & sk8 videos:
metacafe.com/channels/NATAS666DAMIEN
http://www.youtube.com/natas666damien
i have nothing for sale.. :)

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Allex   1 GW

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Re: Sur-Ron - New Mid drive Bike

Post by Allex » Jan 22 2021 7:53pm

efMX Trials Electric Freeride wrote:
Jan 20 2021 6:56pm
hopefully Alex will see this and get to work on it;)
For this we would need to use a wider belt so a total redesign of the belt kit.

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3DTOPO   1 kW

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Re: Sur-Ron - New Mid drive Bike

Post by 3DTOPO » Jan 24 2021 2:24am

Allex wrote:
Jan 22 2021 7:53pm
efMX Trials Electric Freeride wrote:
Jan 20 2021 6:56pm
hopefully Alex will see this and get to work on it;)
For this we would need to use a wider belt so a total redesign of the belt kit.
Sign me up, I'd buy one!

Speaking of mods, I really, really want to be able to run 4" bicycle fat tires for roughly half the season at least. After taking a good look, the swing arm is actually wide enough for a 4" fatty. The problem of course is there isn't room for the chain.

So it got me wondering, if I used roughly a quarter-inch spacer on the side of the chain with a custom hub that was offset for the spacer, that should do the trick. I'm curious what others think of the idea.

Hawaiiguy   1 mW

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Re: Sur-Ron - New Mid drive Bike

Post by Hawaiiguy » Jan 24 2021 1:02pm

Surron Usa has one piece1mm shims for the jack shaft so you could probably get 3 or 4mm more chain spacing.

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3DTOPO   1 kW

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Re: Sur-Ron - New Mid drive Bike

Post by 3DTOPO » Jan 24 2021 4:04pm

Hmm Surron Usa seems to be offline. But I have a lathe so spacers ain't no thang.

Not clear what you are suggesting though. Are you saying just add some spacers?

An other solution would be to move the chain on the outside of the swing arm. If I did that I would use a belt and it would have to be enclosed so it doesn't rip a limb off and would double as keeping the mud out. Obviously quite a bit more work than just offsetting the tire a tad - but would give the maximum clearance possible with the stock swing arm.

Hawaiiguy   1 mW

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Re: Sur-Ron - New Mid drive Bike

Post by Hawaiiguy » Jan 24 2021 4:36pm

2977588B-DC9A-491F-BE88-DA521FA3645B.jpeg
2977588B-DC9A-491F-BE88-DA521FA3645B.jpeg (1.48 MiB) Viewed 580 times
Space the gears away from the tire with shims behind the gears
Last edited by Hawaiiguy on Jan 27 2021 5:50pm, edited 1 time in total.

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3DTOPO   1 kW

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Re: Sur-Ron - New Mid drive Bike

Post by 3DTOPO » Jan 24 2021 5:21pm

Hawaiiguy wrote:
Jan 24 2021 4:36pm
Space the gears away from the tire with shims behind the gears
And were does the extra room needed come from? Flexing open the swing arm?

smdub   100 mW

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Re: Sur-Ron - New Mid drive Bike

Post by smdub » Jan 24 2021 5:33pm

3DTOPO wrote:
Jan 24 2021 5:21pm
And were does the extra room needed come from? Flexing open the swing arm?
There are a couple mm avail to move the chain over towards the swingarm. I fit a SR241 3.50x19 which is ~4.1" wide at the knobs. I know someone else who fit a Michelin Xlite 4.0x18 (but I haven't seen it yet.) I didn't shim my sprockets/chain outwards but I probably will when I pull the jackshaft out for a chain drive conversion.

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3DTOPO   1 kW

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Re: Sur-Ron - New Mid drive Bike

Post by 3DTOPO » Jan 24 2021 5:36pm

smdub wrote:
Jan 24 2021 5:33pm
3DTOPO wrote:
Jan 24 2021 5:21pm
And were does the extra room needed come from? Flexing open the swing arm?
There are a couple mm avail to move the chain over towards the swingarm. I fit a SR241 3.50x19 which is ~4.1" wide at the knobs. I know someone else who fit a Michelin Xlite 4.0x18 (but I haven't seen it yet.) I didn't shim my sprockets/chain outwards but I probably will when I pull the jackshaft out for a chain drive conversion.
Dope. I think 4.1" would do. Would love to see a pic!

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Re: Sur-Ron - New Mid drive Bike

Post by smdub » Jan 24 2021 5:48pm

There are some in this thread somewhere.

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3DTOPO   1 kW

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Re: Sur-Ron - New Mid drive Bike

Post by 3DTOPO » Jan 24 2021 5:50pm

Hmm I just searched this thread for 'smdub' and didn't see any?

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3DTOPO   1 kW

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Re: Sur-Ron - New Mid drive Bike

Post by 3DTOPO » Jan 24 2021 6:11pm

I'm not seeing any 17" fat tires. Looks like they make them in 20", but not nearly as common as 26".

If I ran a 26" bike fat tire on the back, I suppose I would want a 29" bike fat tire in front? Other than raising the bike a bit, would that mess with the geometry much?

Or would it be much better with a 20" in back and 26" in front? Recommendations appreciated.

thoroughbred   100 W

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Re: Sur-Ron - New Mid drive Bike

Post by thoroughbred » Jan 24 2021 6:36pm

20210124_182911.jpg
20210124_182911.jpg (328.02 KiB) Viewed 764 times
Michelin mentioned by smdub, 3 psi tubliss feels like riding on marshmallows. Owner dished the wheel leftward with 2 spoke lengths

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3DTOPO   1 kW

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Re: Sur-Ron - New Mid drive Bike

Post by 3DTOPO » Jan 24 2021 6:38pm

:flame: :flame: :flame: :flame:

Did you move the drive sprocket out too?

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motomoto   1 kW

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Re: Sur-Ron - New Mid drive Bike

Post by motomoto » Jan 24 2021 8:23pm

This place is on the next street from my shop, holy crap.
like a new born babe and not yet listed in
this giggle world;)??? https://ebike.ntc-tech.com

Grantmac   10 kW

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Re: Sur-Ron - New Mid drive Bike

Post by Grantmac » Jan 24 2021 11:33pm

Dishing wheels is very common on motorcycles, shouldn't be a problem.

Likewise running a smaller front tire is the norm on motorcycles. A regular 29er would probably work.

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3DTOPO   1 kW

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Re: Sur-Ron - New Mid drive Bike

Post by 3DTOPO » Jan 24 2021 11:37pm

Grantmac wrote:
Jan 24 2021 11:33pm
Dishing wheels is very common on motorcycles, shouldn't be a problem.

Likewise running a smaller front tire is the norm on motorcycles. A regular 29er would probably work.
I'm not familiar with dishing, I'll have to look it up.

I want a fat wheel up front too for snow/mud/sand etc.

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Re: Sur-Ron - New Mid drive Bike

Post by thoroughbred » Jan 25 2021 6:00pm

motomoto wrote:
Jan 24 2021 8:23pm
This place is on the next street from my shop, holy crap.
like a new born babe and not yet listed in
this giggle world;)??? https://ebike.ntc-tech.com
Is it an actual shop or a pair of guys in college? https://emotobros.com/downloads

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Rix   100 GW

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Re: Sur-Ron - New Mid drive Bike

Post by Rix » Jan 26 2021 6:20pm

3DTOPO wrote:
Jan 24 2021 4:04pm
Hmm Surron Usa seems to be offline. But I have a lathe so spacers ain't no thang.

Not clear what you are suggesting though. Are you saying just add some spacers?

An other solution would be to move the chain on the outside of the swing arm. If I did that I would use a belt and it would have to be enclosed so it doesn't rip a limb off and would double as keeping the mud out. Obviously quite a bit more work than just offsetting the tire a tad - but would give the maximum clearance possible with the stock swing arm.
Here you go. Kim sent out an email reflecting the website address update.

https://www.surronracingusa.com/

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motomoto   1 kW

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Re: Sur-Ron - New Mid drive Bike

Post by motomoto » Feb 01 2021 10:02am

Motomoto wrote:
This place is on the next street from my shop, holy crap.
like a new born babe and not yet listed in
this giggle world;)??? https://ebike.ntc-tech.com
thoroughbred wrote:
Is it an actual shop or a pair of guys in college? https://emotobros.com/downloads
I met the guy the next day. He is a smart young fellow who makes Sur-ron stuff as a hobby, but is the one who makes
the ASI 8000 mounting kits for Litespeed. Beautiful designs and machining from someone new to machining. He is a
software designer and is integrating the regen into the foot brakes he designs and manufacturers.

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X-Nitro   1 W

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Re: Sur-Ron - New Mid drive Bike

Post by X-Nitro » Feb 01 2021 10:23pm

Had to grab one of those gorgeous disc-guards :bigthumb:
:shock: 48v 1500w Custom 1/2 fatty bannaseat hardtail hub streetbike - The modern electric "stingray" mullet bike :bolt: E-Goat Sur-Ron

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Rix   100 GW

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Re: Sur-Ron - New Mid drive Bike

Post by Rix » Feb 04 2021 11:43am

Nice looking SurRon.
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SurRon Katoom.jpeg
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3DTOPO   1 kW

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Re: Sur-Ron - New Mid drive Bike

Post by 3DTOPO » Feb 06 2021 8:42pm

Man I would love to see Sur Ron make something like this buggy:

https://electrek.co/2021/02/06/awesomel ... une-buggy/.

Image

Could strap my Sur Ron bike on the back, my trusty canine companion beside me, and use the buggy to get to a 'basecamp'.

The one above is $3k, I'm thinking $5k would be a sweet spot with a li-ion battery.

GhostShoes   1 µW

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Re: Sur-Ron - New Mid drive Bike

Post by GhostShoes » Feb 11 2021 5:11pm

Has anyone tried to power a 12v trolling motor off their Sur-Ron battery before? Thinking about taking the dinghy out this summer and tired of carrying lead acid batteries.

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