Sur-Ron - New Mid drive Bike

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liveforphysics   100 GW

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Re: Sur-Ron - New Mid drive Bike

Post by liveforphysics » Apr 23 2018 7:14pm

If you're coming from bicycles you will think it's stable and not twitchy, if coming from motorcycles it will feel extremely light and agile.
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Re: Sur-Ron - New Mid drive Bike

Post by Gloert16 » Apr 23 2018 8:49pm

Rix wrote:
Apr 20 2018 8:10pm
58T Sprocket? Check, Renthal Chain 420 pitch Check. Power wheelies? Check. So my indicated speed is 76Kh/H with the 58T. We all know that aint correct. Took it down the road to a police radar trailer which confirmed top speed at 36MPH. It would appear that speed is measured off the motor. Anyone going to a 58T sprocket, just subtract "30" from your top speed in Km/H and you will have your MPH speed.

I know Motomoto is making some super sexy light weight aluminum 58T sprockets, but if any one wants a steel 58T sprocket, I got 2 available for $45 bucks plus shipping. BTW, Motomoto, when will your 52T be ready?
How many links in the 420 chain did you need to adapt to the 58T sprocket?

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Rix   100 GW

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Re: Sur-Ron - New Mid drive Bike

Post by Rix » Apr 23 2018 8:51pm

artisanstone wrote:
Apr 23 2018 2:59pm
Luna now has a 60T aluminum sprocket available I'd just as soon have steel for durability. Don't think much difference between 58 and 60.
Mathematically its less than 4%, not huge. Steel is tougher than aluminum, but aluminum can be made to be tough. I suspect that Moto Moto's sprockets will be the toughest aluminum options out there.

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Re: Sur-Ron - New Mid drive Bike

Post by Rodney64 » Apr 23 2018 8:59pm

Rix wrote:
Apr 23 2018 2:51pm
Rodney64 wrote:
Apr 23 2018 8:07am
Do we have any Sur Rons in Perth. No sure if the stock chainring will handle Perth sand or if the motor will over heat.
Hey Rod, I can tell you the stock gearing does handle semi soft sand with little drama with my heavy weight. If the sand is really soft and deep, no go though. That said, the 58T rear sprocket changes the game. It will handle fairly deep sand, but it will suck the amps doing it. I just rode mine this weekend with the 58T and can believe the level of hill climbing and soft terrain performance it has. Even my Alpha with an 18"MC wheel running north of 8KW will not touch the hill climbing capability of this bike with the 58T. Don't get me wrong, this bike did stall out on me on some really steep stuff, the kind of stuff I wouldn't have even attempted on a hub driven machine.
Thanks Rix, I will need the 60 tooth then, I will try the 42 tooth first. Its a mixture of soft sand and tracks though a pine plantation, My 4065 the the max-e controller bogged down in the soft sand so it will be a good test for the Sur Ron.

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Rix   100 GW

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Re: Sur-Ron - New Mid drive Bike

Post by Rix » Apr 23 2018 9:08pm

Gloert16 wrote:
Apr 23 2018 8:49pm
Rix wrote:
Apr 20 2018 8:10pm
58T Sprocket? Check, Renthal Chain 420 pitch Check. Power wheelies? Check. So my indicated speed is 76Kh/H with the 58T. We all know that aint correct. Took it down the road to a police radar trailer which confirmed top speed at 36MPH. It would appear that speed is measured off the motor. Anyone going to a 58T sprocket, just subtract "30" from your top speed in Km/H and you will have your MPH speed.

I know Motomoto is making some super sexy light weight aluminum 58T sprockets, but if any one wants a steel 58T sprocket, I got 2 available for $45 bucks plus shipping. BTW, Motomoto, when will your 52T be ready?
How many links in the 420 chain did you need to adapt to the 58T sprocket?
112 links. Just counted them.

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Rix   100 GW

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Re: Sur-Ron - New Mid drive Bike

Post by Rix » Apr 23 2018 9:10pm

Rodney64 wrote:
Apr 23 2018 8:59pm
Rix wrote:
Apr 23 2018 2:51pm
Rodney64 wrote:
Apr 23 2018 8:07am
Do we have any Sur Rons in Perth. No sure if the stock chainring will handle Perth sand or if the motor will over heat.
Hey Rod, I can tell you the stock gearing does handle semi soft sand with little drama with my heavy weight. If the sand is really soft and deep, no go though. That said, the 58T rear sprocket changes the game. It will handle fairly deep sand, but it will suck the amps doing it. I just rode mine this weekend with the 58T and can believe the level of hill climbing and soft terrain performance it has. Even my Alpha with an 18"MC wheel running north of 8KW will not touch the hill climbing capability of this bike with the 58T. Don't get me wrong, this bike did stall out on me on some really steep stuff, the kind of stuff I wouldn't have even attempted on a hub driven machine.
Thanks Rix, I will need the 60 tooth then, I will try the 42 tooth first. Its a mixture of soft sand and tracks though a pine plantation, My 4065 the the max-e controller bogged down in the soft sand so it will be a good test for the Sur Ron.
Stock is 48T unless you got the super motard 17" wheels. So 60T with 17 wheels should get you through the deep loose sand pretty well.

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motomoto   1 kW

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Re: Sur-Ron - New Mid drive Bike

Post by motomoto » Apr 24 2018 1:31am

Mathematically its less than 4%, not huge. Steel is tougher than aluminum, but aluminum can be made to be tough. I suspect that Moto Moto's sprockets will be the toughest aluminum options out there.
7075 will wear faster than steel but is lighter and easier to machine. I think the aluminum sprockets should hold up well because the
power load is not huge on this bike.

I finally decided to put a 58 tooth on my bike (one that I messed up). I took it for a spin. It does accelerate a bit faster. The motor
has its' way with pushing the weight more. 58/48 is about 20% difference and it is noticeable.

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Re: Sur-Ron - New Mid drive Bike

Post by johnrobholmes » Apr 24 2018 7:28am

anybody found info on re calibrating the speedo with the different sprocket size?

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fechter   100 GW

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Re: Sur-Ron - New Mid drive Bike

Post by fechter » Apr 24 2018 8:05am

johnrobholmes wrote:
Apr 24 2018 7:28am
anybody found info on re calibrating the speedo with the different sprocket size?
Not that I am aware of. It seems it gets the speed from the motor hall signals. There must be some kind of programming interface for the controller but I don't think anybody outside of SurRon has it. Plan B would be to install a bike speedometer.
"One test is worth a thousand opinions"

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Re: Sur-Ron - New Mid drive Bike

Post by motomoto » Apr 24 2018 6:27pm

Here is a couple of pics of the 58t
58t 2.jpg
58t 3.jpg

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Re: Sur-Ron - New Mid drive Bike

Post by johnrobholmes » Apr 24 2018 7:01pm

Got a chance to go over the supermoto wheels.


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Rix   100 GW

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Re: Sur-Ron - New Mid drive Bike

Post by Rix » Apr 24 2018 10:34pm

motomoto wrote:
Apr 24 2018 6:27pm
Here is a couple of pics of the 58t 58t 2.jpg
58t 3.jpg
That is very nice Kim.
Last edited by Rix on Apr 29 2018 5:17pm, edited 1 time in total.

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Rix   100 GW

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Re: Sur-Ron - New Mid drive Bike

Post by Rix » Apr 24 2018 11:10pm

Pics from my ride on Sunday. Was a good day.
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Allex   1 GW

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Re: Sur-Ron - New Mid drive Bike

Post by Allex » Apr 25 2018 2:36am

Nice with a kickstand huh...
No need to find awkward places to put your pedals on.

Which bike do you think will be used the most now?

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Re: Sur-Ron - New Mid drive Bike

Post by maitilupas » Apr 25 2018 6:34am

i hate kickstands on a off road bicycle, i love to lay them down , i just get this freedom feeling

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Re: Sur-Ron - New Mid drive Bike

Post by motomoto » Apr 25 2018 9:18am

Pics from my ride on Sunday. Was a good day.
Let's go ride!! I would love to drive to Nevada and ride your trails. I have a 58t on my bike too. Let's PM a time
and place. I have a Mavic Pro and a GoPro for some video. I have one extra battery. I wish we had 2. That would be
an epic day !!

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Rix   100 GW

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Re: Sur-Ron - New Mid drive Bike

Post by Rix » Apr 25 2018 2:12pm

motomoto wrote:
Apr 25 2018 9:18am
Pics from my ride on Sunday. Was a good day.
Let's go ride!! I would love to drive to Nevada and ride your trails. I have a 58t on my bike too. Let's PM a time
and place. I have a Mavic Pro and a GoPro for some video. I have one extra battery. I wish we had 2. That would be
an epic day !!
Hell Yah Kim!! Got your PM I know the weekend of May 2 is out. Will PM you with other optional times.

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Rix   100 GW

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Re: Sur-Ron - New Mid drive Bike

Post by Rix » Apr 25 2018 2:15pm

Allex wrote:
Apr 25 2018 2:36am
Nice with a kickstand huh...
No need to find awkward places to put your pedals on.

Which bike do you think will be used the most now?
I still ride the Stealth P7 alot from the house, as it performs bicycle duties really well. As far as any ride where I haul my bike in my truck, the Sur-Ron will be my go to machine.

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Re: Sur-Ron - New Mid drive Bike

Post by LeftieBiker » Apr 26 2018 5:03am

maitilupas wrote:
Apr 25 2018 6:34am
i hate kickstands on a off road bicycle, i love to lay them down , i just get this freedom feeling

Unless you like to lay it down and then slide backwards on the left side, I don't see that kickstand hanging up.

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Rix   100 GW

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Re: Sur-Ron - New Mid drive Bike

Post by Rix » Apr 26 2018 9:55am

LeftieBiker wrote:
Apr 26 2018 5:03am
maitilupas wrote:
Apr 25 2018 6:34am
i hate kickstands on a off road bicycle, i love to lay them down , i just get this freedom feeling

Unless you like to lay it down and then slide backwards on the left side, I don't see that kickstand hanging up.
No the kickstand wont drop on its own. Its has a very strong spring.

maitilupas   10 W

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Re: Sur-Ron - New Mid drive Bike

Post by maitilupas » Apr 26 2018 10:56am

i mean lay the bycicles down , on nature

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Re: Sur-Ron - New Mid drive Bike

Post by johnrobholmes » Apr 26 2018 11:32am

You don’t have to use the kickstand :lol:

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Re: Sur-Ron - New Mid drive Bike

Post by maitilupas » Apr 26 2018 12:23pm

nooo

there is no gasoline!

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Re: Sur-Ron - New Mid drive Bike

Post by maitilupas » Apr 26 2018 12:52pm

johnrobholmes wrote:
Apr 24 2018 7:01pm
Got a chance to go over the supermoto wheels.

i love you play tunes while calibrating the spokes , this is new for me

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Re: Sur-Ron - New Mid drive Bike

Post by Raisedeyebrows » Apr 26 2018 1:00pm

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