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A popular 29“ e-bike, full touring-equipped, featuring a powerful Sport Drive mid-motor and a semi-integrated battery with easy removal and simple charging.
A popular 29“ e-bike, full touring-equipped, featuring a powerful Sport Drive mid-motor and a semi-integrated battery with easy removal and simple charging.
Rock Machine

Rock Machine Storm E90 29 Inch Wheel Electric Bike Black

£2,750.00
Size Guide
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined

Cycle King Store Returns Policy

📄 Download Returns PDF

🛒 1. Online Returns Policy Online Orders

If you’d like to return an item purchased online, the process is quick and simple.

Tell Us First

  • Email sales@cycleking.co.uk within 14 days of receiving your order.
  • Include your name, order number and the item(s) you wish to return.

Send the Item Back

You then have a further 14 days to return the item to:

Cycle King Online Returns
Professional Place, Hodgson Way
Wickford, SS11 8YX
Phone: 01268 574040

We recommend using a tracked service and retaining your proof of postage.

Return Conditions

Items must be:

  • Unused and in original packaging
  • Complete with all parts and accessories

We cannot accept:

  • Used items
  • Worn/installed parts
  • Personalised or special-order items (unless faulty)

Refunds

  • Processed within 5–10 working days of receipt
  • Postage costs are non-refundable unless the item is faulty or incorrect

Faulty or Damaged Items

Email us with photos/videos and we’ll resolve the issue quickly.
This does not affect your statutory rights.

Exchanges

Please follow the returns steps above and place a new order for the replacement.

🏬 2. In-Store Returns Policy In Store

If you purchased your item in one of our stores, we’re happy to help if something isn’t right.

Returning an Item to Store

You can return your purchase to any Cycle King branch. Please bring:

  • The item in unused, original condition
  • Proof of purchase (receipt, gift receipt, or bank statement)

Timeframe

  • Refunds available within 14 days of purchase
  • After 14 days, an exchange or store credit may be offered at the manager’s discretion

Return Conditions

Items must be:

  • Unused and in original packaging
  • Complete with all parts and accessories

We cannot accept:

  • Used items
  • Worn/installed parts
  • Personalised or special-order items (unless faulty)

Refunds

Refunds are issued back to the original payment method:

  • Card refunds must go back to the same card used
  • Finance purchases follow V12 terms
  • Gift voucher purchases are refunded as gift vouchers

Faulty or Damaged Items

Bring the item back with proof of purchase and our team will assess the fault.

Depending on the issue and age of the product, we will repair, replace, or refund as appropriate.
This does not affect your statutory rights.

Exchanges

Where suitable, we can offer an exchange or store credit under the return conditions above.

Returns Policies (UK)

Information on online and in-store returns, exchanges and refunds.

💻 Online Returns – How do I start a return? Online

Email sales@cycleking.co.uk within 14 days of receiving your order.
Include your name, order number and the item(s) you wish to return.

📦 Where do I send my return? Address

Cycle King Online Returns
Professional Place, Hodgson Way
Wickford, SS11 8YX

You then have a further 14 days to return the item. We recommend using a tracked service and keeping proof of postage.

✅ What are the online return conditions? Conditions

Items must be:

  • Unused and in their original packaging
  • Complete with all parts and accessories

We cannot accept returns of:

  • Used items
  • Worn/installed parts
  • Personalised or special-order items (unless faulty)
💷 When will I receive my refund? Refunds

Refunds are processed within 5–10 working days of receiving the returned item.
Return postage is the customer’s responsibility unless the item is faulty or incorrect.

⚠️ What if my item is faulty or damaged? Faulty

Email us with clear photos/videos and we will resolve this quickly.
This does not affect your statutory rights.

🔄 Can I exchange an online order? Exchange

Yes — return the item as normal and place a new order for the replacement.

In-Store Returns Policy

Return or exchange items at any Cycle King branch, subject to the conditions below.

🏬 Can I return an in-store purchase? In-Store

You can return unused spares and accessories to any Cycle King branch.

Please bring:

  • Unused item in its original condition
  • Proof of purchase (receipt, gift receipt or bank statement)

Bikes: Once ordered, built and collected, bikes can only be exchanged if unused.

🕒 What is the in-store returns timeframe? Timescales
  • Refunds and exchanges available within 14 days of purchase
  • After 14 days, a store credit may be offered at the manager’s discretion
📑 What are the in-store return conditions? Conditions

Items must be:

  • Unused and in original packaging
  • Complete with all parts and accessories

We cannot accept:

  • Used items
  • Worn or installed parts
  • Personalised or special-order items (unless faulty)
💳 How are refunds issued in-store? Refunds
  • Refunds go back to the original payment method
  • Card refunds must be issued to the same card used
  • Finance purchases follow V12 Finance terms
  • Gift voucher purchases are refunded as gift vouchers
🛠️ What happens with faulty or damaged items? Faulty

Please return the item with proof of purchase.
Our team will assess and repair, replace or refund where appropriate.
This does not affect your statutory rights.

🔁 Can I exchange an in-store purchase? Exchange

Yes — we can offer an exchange or gift voucher if the return meets our conditions.

Rock Machine Storm E90 29 Inch Wheel Electric Bike Black

Brand:Rock Machine

Code:C:1RX160AM

The Rock Machine Storm E90 29 Inch Wheel Electric Bike is a cutting-edge option for riders seeking high performance and versatility on both urban streets and rugged trails. Its 29-inch wheels provide excellent traction and stability, ensuring smooth rides over various terrains. Equipped with a powerful electric motor, this bike offers seamless assistance for conquering steep inclines and covering long distances with ease. The robust frame construction and quality components make it durable enough to handle rough trails while maintaining agility and responsiveness. With features like integrated lights, a digital display, and adjustable suspension, the Storm E90 prioritizes rider comfort and control. Whether commuting to work or exploring off-road trails, this electric bike delivers an exhilarating and reliable riding experience for adventure enthusiasts. The Sport Drive system delivers superior power to reach a range of about 100 km*. You will also value the bike’s extras, including mudguards, lights supplied from the main battery, a kickstand, and a lock.


  • Sport Drive motor with 90 Nm, battery 500 Wh and range up to 100 km*
  • Shimano ALTUS 1x9 38 x 11-36, SHIMANO disc brakes
  • Frame with Fun Ride Geometry to increase Comfort&Control and to make uphills and downhills easier
  • SR Suntour MOBIE25 fork (75 mm)
  • WTB Nineline 29x2.25" tires with Reflective Tape
Technical Information
FRAMEAlloy Al-6061 T6 custom tubing, smooth welding, fun ride geometry
DRIVE UNIT
Sport Drive mid motor
BATTERY
Sport Drive, 36V, 500Wh, on-frame mount
BATTERY RANGE100 km / 62 miles (1st level of support)

* This will vary depending on weight of user, terrain and mode of pedal assistance used
CHARGER
Sport Drive standard charger, 36V/2A, charging time up to 7,5 hours
DISPLAY
Sport Drive grip display
FORK
SR Suntour Mobie25 RLR, tapered, coil, QR type, remote lockout, 75mm travel
CRANKSET
Wheel Top ED2L, 38T
PEDALSMarwi SP-827 sand block Non/slip pedal
REAR DERAILLEURShimano Altus RD-M2000 Shadow
SHIFTERShimano Altus SL-M2010-9R RapidFire Plus, 9-speed
CASSETTE
Shimano CS-HG200-9, 11-36T
CHAIN
KMC e9S
WHEELSETShimano Deore HB-M6010, 32H, center lock, 15x100mm thru type axle
Shimano Alivio FH-M4050, 32H, center lock, M10x135mm, QR type
WTB SX19, 32H
TYRES
WTB Nineline Comp, 29x2.25", reflective tape
BRAKESET
Shimano BL-MT200/BR-MT200, 160/160 rotor, hydraulic disc brake
HEADSET
FSA Orbit 1.5E No.57B, Zero Stack, 1-1/8"-1.5"
HANDLEBAR
ONE1 Alloy, MTB AL-325BT, 6° upsweep, 9° backsweep, 25mm rise, 740mm, 31.8mm
STEM
ONE1 TDS-C301 alloy, 31.8xE65mm, +6°
GRIPS
Velo VLG-1879D2, ergo grip
SADDLE
WTB Volt Sport
SEATPOST
ONE1 Alloy, SPS 405, 27.2x350mm
HEADLIGHT
AXA Blueline 30
TAILLIGHT
Spanninga Pling
REAR CARRIERWith AVS system for easy attaching of bags
ACCESSORIESCarrier, mudguards, lights, kickstand
WEIGHT24.9kg (medium)
Sizing Information
Which size bike is best for you? Take a look at the following guide for Ammaco bikes to help find the right size for you.

Adults bikes and those for 10/11 years and over, are generally measured by frame size. This is normally the measurement between the centre of the bottom bracket to the top of the seat tube.

Rider Height (feet & inches)
MTB / Offroad Bike Frame SizeHybrid Bike Frame SizeRoad Bike Frame Size
5' to 5'4"14" - 16"15" - 17"48 - 50cm
5'4" to 5'8"16" - 18"17" - 19"50 - 52cm
5'8" to 6'18" - 20"19" - 21"52 - 56cm
6' to 6'2"20" - 22"21" - 23"56 - 60cm
6'2" to 6'4"21" - 23"22" - 24"58 - 64cm
Professional Opinion

Electric bikes are just like standard bikes, but far easier to ride thanks to the addition of a motor to assist your progress.

Electric bikes are making personal travel that little bit more enjoyable for everyone, with e-bikes becoming a common sight on Britain's streets.

E-bikes have seen a major image and quality revamp over the last few years, which has seen user numbers sore over the past few years and are still increasingly growing year on year, with no less than 60,000 e-bikes sold each year here in the UK.

With the soaring cost of living at the moment, an electric bike can be the perfect tool to reduce your daily costs.

You'll save money on petrol - In fact, the majority of journeys (71% in England) made are under five miles. But cycling only accounts for less than 2% of all journeys. Imagine the money we could save if we switched those short drives to pick up a few items at the shops or dropping the kids off at school to a bike.

Less car maintenance will be required

You'll still get exercise – e-cycling is not cheating! Many studies have shown that e-bikers get plenty of very beneficial aerobic exercise. The vast majority of e-bikes have power level settings on the handlebar controls that let you dial down the power if you want more exercise or turn it up if in need of more assistance.

You're helping the planet by cutting down on less emissions.

They are great fun to ride!

Just like a standard bike, electric bikes come in a variety of styles, from folding bikes to off-road mountain bike machines, here at Cycle King we have something to suit everyone's needs.

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