SpeedFun Furious Evo Easy+ for Rocky Mountain Dyname 4.0

This speed unlocker is compatible with Rocky Mountain Dyname 4.0 motors from 2022 equipped with a 720Wh Powerplay battery and Jumbotron display.

Regular price£140.00
/

&Free Delivery Worldwide

You can save money when buying more than one tuning kit. Can be combined with other brand/type tuning kits!
Buy 2 save £4.20
£140.00 £135.80
Buy 3 save £9.80
£140.00 £130.20

GO FROM CAPTAIN SLOW OF YOUR CYCLING GROUP TO JIMMY JET!

- TOM E.

Tuning kit does not show real speed data DOESN'T SHOW REAL SPEED DATA
The active tuning kit makes the speedometer show a slower speed
unlimited-max-speed-setting UNLIMITED MAX SPEED SETTING
Tuning kit removes all speed limits
on/off activation ON/OFF TUNING ACTIVATION
The tuning kit is active by default, but can be set to ON/OFF mode. This change is permanent.
free shipping FREE SHIPPING WORLDWIDE
warranty 1 YEAR WARRANTY
easy to install EASY TO INSTALL

Main Product Information

SpeedFun Furious Evo easy+ for Rocky Mountain Dyname 4.0 is a revolutionary tuning kit which suppresses the speed limiter of your electric bike.

When the device is active, the display will show the exact speed up to the threshold of approximately 15 KmH, beyond which a manipulated speed will always be shown below 25 KmH.

The tuning kit manipulates the speed signal without altering the motor's power relative to pedaling speed. This guarantees a smooth motor control without speed limit interruptions. Depending on a tuning kit, some determine when assistance stops, while others remove the restriction entirely for continuous support. However, the achievable speed mostly depends on the eBike model. Achievable speed can be calculated using a simple formula:

Speed = Cadence [rpm] * Wheel circumference [mm] * Front Chainring Teeth / Rear Chainring Teeth * 60 [min/h] / 1.000.000 [mm/km]

After installation, your tuning kit will be activated with the activation of your eBike. Maximum speeds of ~30mph (50km/h) or even faster can be expected, depending on the bike and gearing.

This speed unlocker is compatible with Rocky Mountain Dyname 4.0 motors from 2022 equipped with a 720Wh Powerplay battery and Jumbotron display.

Ebike with Rocky Mountain Dyname 4.0 motor where the Furious Evo easy+ device has been successfully installed (this list is illustrative and not exhaustive)

– Altitude Powerplay Carbon 90 Rally Edition
– Altitude Powerplay Carbon 70
– Altitude Powerplay Alloy 70
– Altitude Powerplay Alloy 50
– Altitude Powerplay Alloy 30 Coil
– Instinct Powerplay Carbon 90
– Instinct Powerplay Carbon 70
– Instinct Powerplay Alloy 70
– Instinct Powerplay Alloy 50
– Instinct Powerplay Alloy 30

When connecting Tuning Kit to an e-bike you will find connectors colored to make installation very simple. We have prepared detailed instructions and videos to make installation easy for you. Disassembly of our tuning kit is just as easy. If you have any troubles with installation or disassembly, do not hesitate to contact us. If you are planning to install Speedfun on a brand-new bike, make sure you ride it for at least 0.6 miles (1 km) before the tuning kit is activated.

Please note that the operation of this type of modified electric bikes on public roads may be against the law in some countries. The manufacturer takes no responsibility for damages resulting from the use SpeedFun products. Electric bikes equipped with SpeedFun products are not allowed to be used on public roads, cycling paths and public places. Electric bikes equipped with SpeedFun products can be used exclusively on private property and entirely at one’s own risk.

The use of SpeedFun may void the warranty of your ebike. We strongly recommend using other safety features and protective gear to prevent injuries in higher speeds.

Warranty does not cover damage resulting from eBike software updates. Remove the tuning kit before updating the software. Check with us first to ensure the kit is compatible with your updated eBike. We cannot guarantee that the kit will function the same after updates. Please exercise caution.

Manufacturer information:

Speedfun
Phase B snc di Garbo Federico & C.
via Leonardo da Vinci, 13
IT35020 Casalserugo (PD)
Italy
+39 0498740422
info@speedfun.bike

1 year warranty by Manufacturer

quote

The bike feels completely different once derestricted - it's just like a whole different bike! The rides are so much more fun now! Tuning kits are safe to your bike and every ebiker should have one installed! You will love riding your ebike with it - guaranteed!

Matt - Owner of Two Wheels Empire

What Our Clients Say About It?

Customer Reviews
5.0 Based on 1,047 Reviews
5 ★
96% 
1010
4 ★
3% 
32
3 ★
0% 
4
2 ★
0% 
0
1 ★
0% 
1
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Filter Reviews:
NS
04/03/2025
Neil S.
United Kingdom

Levociraptor generation 3

I installed the device and in practical terms the result was good. The bike continued to produce power at higher speeds, But the speed indicated on my Garmin Edge 540 was hugely understated! I had understood that with the version 3 Speed reflected would be correct. Have I installed correctly....read moreI installed the device and in practical terms the result was good. The bike continued to produce power at higher speeds, But the speed indicated on my Garmin Edge 540 was hugely understated! I had understood that with the version 3 Speed reflected would be correct. Have I installed correctly. I followed the directions provided but I did not install the IOS app, do I need to do that?

JF
03/29/2025
John F.
United Kingdom

Works amazingly well and the MPH reads reasonably accurately as well as removing the manufacturer restrictions, my only criticism is the user and install instructions could dramatically improve. Overall an amazing well engineered product.

MG
03/27/2025
Mario G.
Italy

Ottimo prodotto però.....

Il dispositivo sembra funzionare bene peccato che per poter cambiare il suo settaggio bisogna scaricare una applicazione che sembra essere a pagamento. Con quello che costa il prodotto non mi sembra molto corretto.

SA
03/25/2025
Spencer A.
United Kingdom

3rd one I’ve had :(

To be honest I’m not sure about this kit. On the first kit I bought, the magnet wheel disintegrated after about 6 months use. To give them their due, Two-wheel Empire gave me a full replacement kit for half-price. However, the wheel has also disintegrated on the replacement kit after...read moreTo be honest I’m not sure about this kit. On the first kit I bought, the magnet wheel disintegrated after about 6 months use. To give them their due, Two-wheel Empire gave me a full replacement kit for half-price. However, the wheel has also disintegrated on the replacement kit after another 6 months use whilst out on a ride. I have now purchased just the replacement wheel as the casing seems robust enough, however I”m not sure if these planet wheels are up to the job. I’m fully expecting it to fail again, which is a pity because the kit transforms the ride experience. I wonder if there is a better material that these wheels can be manufactured from - is it aluminium or some sort of 3D-printed additive metal? Either way, it’s not up to the job :(