BULLS E-Core Di2 FS 27.5+

Electric bike frame size guide

Inside leg range Frame size
24 - 29" (61 - 74cm) 14" (35.56cm)
25 - 30" (64 - 76cm) 15" (38.1cm)
26 - 31" (66 - 78cm) 16" (40.64cm)
27 - 32" (69 - 81cm) 17" (43.18cm)
28 - 33" (71 - 84cm) 18" (45.72cm)
29 - 34" (74 - 86cm) 19" (48.26cm)
30 - 35" (76 - 88cm) 20" (50.8cm)
31 - 35" (79 - 88cm) 21" (53.34cm)
32 - 37" (81 - 94cm) 22" (55.88cm)
33 - 37" (84 - 94cm) 23" (58.42cm)

The Bulls E-Core Di2 FS 27.5+ represents the very latests in eMTB technology, incorporating the hugely successful Shimano Steps E8000 motor, Di2 electronic shifting, a high-capacity 500Wh removable battery, and 150mm travel suspension front and rear. Unstoppable!

If you’d like a test-ride please call in at our London, Leicester or Suffolk branches, or email to arrange a date.



For larger image please see bottom of page.

Motor Power
Battery Location
In Frame, removable
Battery Chemistry
and Capacity

Li-Ion, 500 Wh
(36 Volt x 13.4Ah)

500 36 13.4

E-Core Di2 FS 27.5+

The BULLS E-Core Di2 FS 27.5+ is an uber spec eMTB. It took a while, but component giant Shimano have at last entered the fast growing e-MTB market with their E8000 STEPS system. Consisting of a new powerful drive unit paired to a component groupset designed for the rigours of riding off-road, it’s obviously designed to steal back market share from rivals BROSE and Bosch.

The high-power Shimano Steps 8000  motor delivers a smooth 70Nm of torque capable of taking you to the top of almost anything. There are three assistance modes: Eco, Trail and Boost, with the latter giving a maximum of 300% assistance. It also has a walk assist function to help manage the bike when you’re pushing not riding! Long-travel RockShox suspension will keep you in one piece on the way up and Magura MT4 (rear) and MT5 (front) hydraulic disc bakes provide ample stopping power should your nerve crack on the way back down.


The drive unit accommodates frames with shorter chainstays to give STEPS MTB equipped bikes typical mountain bike handling and manoeuvrability. Additionally, the narrow Q factor is what ultimately provides an efficient pedal stroke. Combining these features ensures a perfectly balanced riding position and gains more ground with each pedal stroke, providing you a natural riding feeling.







At 2.8kg,  the STEPS drive unit is a full kilo less than the Bosch drive system. While the Bosch unit uses a small driver cog that’s geared up from the crank, the Shimano is directly driven by a larger chainring, enabling use of 34T or 38T options. The image below shows rearward location of the hollowtech shaft:








Rain or snow, the gear hub shifts smoothly in any condition thanks to Di2. It briefly reduces power as shifts are made, so that changing gear is astonishingly smooth. Based on cadence and speed, the SHIMANO STEPS MTB system automatically tells the hub what gear to shift to. Like magic!


DRIVE UNIT   Shimano steps E8000 70Nm
BATTERY   36 Volt 13.4 Amp = 500Wh
SHIFTER   Shimano Deore XT Di2 SW-M8050
REAR DERAILLEUR   Shimano Deore XT Di2 RD-M8050-GS Shadow Plus
CASSETTE   Shimano Deore XT CS-M8000 11-46T
BRAKE   Magura MT5 and MT4 hydraulic disc
TIRE   Schwalbe Rocket Ron 70-584 (27.5 x 2.8)

Specifications correct at product launch date and may vary during production year.

All of our electric bikes are fully assembled, checked and road-tested by our expert staff prior to delivery.

High quality electric bikes last for many years so it’s important you get the one that’s right for you – but there are so many to chose from! Online research can help you narrow the options but by far the best way to ensure you’re making the right choice is to visit one of our branches, discuss you needs with one of our friendly experts, and test-ride one or all of the many brands and models we stock – there’s no substitute for spending time in the saddle!  Once you’ve made your choice you can ride your new e-bike away. Don’t worry if you can’t spare the time or are just too far from one of our shops, we’ll be happy to help you choose over the phone or via email and deliver your e-bike to your home at a time that best suits you.

▶ Personal Home Delivery

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If you choose this option our experienced staff will deliver your electric bike in person to your door fully assembled and tested at a pre-arranged time, and will work with you to ensure every thing is perfectly adjusted to suit your size and preferred riding style before that all-important test ride. We’ll spend time with you to make sure you’re happy with your choice and understand all its features, so be ready to put the kettle on!

After your test ride, when everything has been fine-tuned to your liking and you are comfortable with your e-bike we will fit any accessories you may have ordered – or those you might already have – a favourite old saddle perhaps, a particular bell, or pair of trusted hand-me-down panniers.

Only when we are certain you are completely confident in your e-bike choice and understand how everything works will we leave you to enjoy your new found freedom.

The cost of this personal service varies depending on your location and whether you would prefer evening or weekend delivery, please email or telephone us for an estimate.

Note: After you have inspected the bike, found it to be in good working order, and agreed that this is the right bike for you, the sale will be complete. If we have delivered in person please be sure you are happy with everything before we leave as we cannot accept returns once our delivery staff have driven away unless the e-bike can been shown to have a design or manufacturing fault. We then retain the right to determine the appropriate remedy, be that on-site repair or replacement of a part, a replacement electric bike, or full or partial refund. If the reason you decide not to accept the bike could have been established easily before you ordered it (e.g. you ordered a white bike and later decided you prefer black), we reserve the right to make reasonable charges for delivery and or any work done to the bike prior to delivery.

▶ Evening and weekend delivery:

Because few of us are at home during working hours these days, we offer the option of our personal home delivery service on Saturdays and Sundays, and evenings during the week.

The cost of this personal service varies depending on your location and whether you would prefer evening or weekend delivery, please email or telephone us for an estimate.

▶ Courier Delivery

Before being delivered via courier your e-bike will be fully assembled and road tested. Once we’re happy with all aspects of its performance we will carefully pack it in a sturdy box ready for shipping.  Please note that the pedals are removed and handlebar rotated inline with the frame for packing so these will need to be fitted and adjusted on arrival. This is simple to do but should you like reassurance we will happily talk you through the process over the phone, we can also arrange a phone-call with your local, trusted bike mechanic if you decide you would rather give the job to them.


Telephone: 01728 830 817 (Suffolk), 0208 960 9848 (London), 0116 3666 980 (Midlands)
Email: info@justebikes.co.uk


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