Speed

duk13

Just Joined
Aug 19, 2025
2
0
Hi I've recently bought a eff ebike of a friend and I can't decide wether or not to get a speedbox chip or if anyone knows of another way to derestrict without a chip.... that would be much appreciated for any help or guidance


I'm not sure who makes the motor
 

matthewslack

Esteemed Pedelecer
Nov 26, 2021
2,570
1,663
Just stay legal. Illegal bikes make life harder for the rest of us.
 

duk13

Just Joined
Aug 19, 2025
2
0
Just stay legal. Illegal bikes make life harder for the rest of us.
Don't get me wrong I do love the bike but just on the throttle alone it only reaches 12.5 mph compared to the 21 it dose in the air and I'm only 10 stone so it just doesn't feel like it should both speed and or thrill wise
 

thelarkbox

Esteemed Pedelecer
Aug 23, 2023
1,656
514
oxon
Don't get me wrong I do love the bike but just on the throttle alone it only reaches 12.5 mph compared to the 21 it dose in the air and I'm only 10 stone so it just doesn't feel like it should both speed and or thrill wise
Thats not ideal, and would indicate problem.
Fully charge the battery and take a voltage reading of the output to get a quick indicator of your battery health.

Take a few pics of the bike especially the handle bar display to help id the bike and its system.
 

saneagle

Esteemed Pedelecer
Oct 10, 2010
9,181
4,097
Telford
If it does 21 mph with the wheel in the air, it's not restricted in any way, so no Speedbox or any similar device would help you. You need to provide information about the battery and controller in order to get advice on how to get more power.
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
21,602
8,804
62
West Sx RH
12.5mph without peddling , illegal motor vehicle then.
 

matthewslack

Esteemed Pedelecer
Nov 26, 2021
2,570
1,663
Maybe that's all it can manage. Is it the fat tyre model? Those tyres have higher rolling resistance than normal wheels so maybe the motor isn't happy about that.