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Transition Regulator SX electric full-suspension mountain bike with Bosch SX assistance, a 400Wh battery and agile mixed-wheel trail handling.
Transition Regulator SX electric full-suspension mountain bike with Bosch SX assistance, a 400Wh battery and agile mixed-wheel trail handling.
Transition

Transition Regulator SX Deore Mullet Electric Full Suspension Mountain Bike 2025 in Madrone Gold

£5,799.00 £6,999.00 17% off
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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
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Hassle free returns

In the unlikely event that you are not satisfied with your purchase please feel free to return your items within 90 days of the purchase date for a full exchange or refund. Any item (excluding food, underwear or e-gift vouchers) can be returned to us for any reason within 90 days, provided that the item has not been used or fitted and is returned in its original packaging with valid proof of purchase.

It is recommended that you use a recorded delivery service or return to a store to ensure your items are received by us. We cannot assume responsibility for items that are lost in transit back to us.




Terms & Conditions

Items must be returned in their original packaging and unused. Refunds will be issued once the product(s) have been received and inspected.

Click & Collect customers can buy with confidence knowing that they can review the item before deciding whether it is right for you before leaving the store. Should you decide it's not right for you, it can be conveniently exchanged or refunded straight away, or you still have up to 90 days to return it if you are still unsure.

Please note:
1. If the items we have sent you are faulty, damaged or not as we described, we will cover the cost of collection and the delivery of the correct item.

2. If we have delivered the correct bike but upon inspection, you decide the bike is not the one for you, we will charge you £50 for collection (£100 from Northern Ireland). If you do not have the original box in usable condition, we will charge you an additional £15 to provide one.

Refunds will be processed using the same method of payment used for the original purchase. Credit & debit card refunds must be made to the card used for the original purchase.

We are unable to offer a refund without a valid proof of purchase.

Transition Regulator SX Deore Mullet Electric Full Suspension Mountain Bike 2025 in Madrone Gold

Season:2025Sale

Brand:Transition

Code:DLGenordaMERD.BRC.XS.GER.

The Transition Regulator SX is a lightweight-feeling carbon electric mountain bike designed around the responsive Bosch Performance Line SX system.

Its 400Wh internal battery keeps the package compact while 150mm rear and 160mm front travel provide the capability needed for technical trail riding and all-mountain terrain.

With a 29in front and 27.5in rear wheel combination, the Regulator SX prioritises agile handling and a natural ride character while still adding meaningful assistance on the climbs.

Features & Benefits:

  • Bosch SX Drive Unit: The lightweight Performance Line SX system adds responsive pedal assistance while preserving a lively trail-bike character.
  • 400Wh Compact Battery: The integrated 400Wh battery supports a lighter, more agile e-MTB package for local laps and technical rides.
  • Mixed-Wheel Trail Handling: A 29in front and 27.5in rear wheel setup works with 150/160mm travel for confident rollover and responsive handling.

Full Specification:

  • Frame: Regulator SX Carbon, 150mm rear travel
  • Rear Shock: RockShox SuperDeluxe Select, 205x60mm
  • Fork: RockShox Lyrik Base, 160mm
  • Motor: Bosch Performance Line SX (BDU31)
  • Battery: Bosch CompactTube 400Wh
  • Controller: Bosch Wireless Mini Remote
  • Charger: Bosch Charger
  • Number of Gears: 12
  • Gear Shifters: Shimano Deore
  • Chainset: RaceFace Aeffect R E-MTB, 160mm
  • Rear Cassette: Shimano Deore M6100, 10-51T
  • Chain: Shimano Deore M6100
  • Rear Derailleur: Shimano Deore
  • Pedals: Not Supplied – Shop Pedals Here
  • Wheelset: WTB ST i30 mixed wheelset
  • Front Tyre: Maxxis Assegai front / Minion DHR II rear
  • Rear Tyre: Maxxis Assegai front / Minion DHR II rear
  • Brakes: Hydraulic disc brakes
  • Handlebars: Source-listed Transition build cockpit
  • Grips or Bar Tape: Source-listed lock-on grips
  • Headset: Source-listed headset
  • Stem: Source-listed stem
  • Saddle: Source-listed saddle
  • Seatpost: Source-listed seatpost
  • Weight: N/A

Manufacturers reserve the right to change specifications without notice based on availability at the point of assembly.

Size Guide for Transition

SizeRider Height
X-Small (XS)143–158 cm (4'8"–5'2")
Small (S)153–168 cm (5'0"–5'6")
Medium (M)163–178 cm (5'4"–5'10")
Large (L)173–188 cm (5'8"–6'2")
X-Large (XL)183–198 cm (6'0"–6'6")
XX-Large (XXL)188–203 cm (6'2"–6'8")

Geometry for Transition Regulator


SMMDLGXL
HIGH/LOWHIGH/LOWHIGH/LOWHIGH/LOW
A.REACH425/420455/450480/475510/505
B.STACK623/628632/637641/646651/656
C.EFFECTIVE TOPTUBE LENGTH551/554583/587610/615643/648
D.SEATTUBE LENGTH375400440470
E.EFFECTIVE SEATTUBE ANGLE78.8/78.378.5/78.078.2/77.777.9/77.4
SADDLE HEIGHT FOR EFFECTIVE SEATTUBE ANGLE600660720780
ACTUAL SEATTUBE ANGLE75/74.575/74.575/74.575/74.5
SEATTUBE OFFSET AT BOTTOM BRACKET41414141
F.HEADTUBE LENGTH105115125135
G.HEADTUBE ANGLE64.5/64.064.5/64.064.5/64.064.5/64.0
H.CHAINSTAY LENGTH442/444442/444448/450448/450
I.WHEELBASE1201/12031235/12371271/12731305/1307
J.BOTTOM BRACKET DROP (FRONT)20/2520/2520/2520/25
J.BOTTOM BRACKET DROP (REAR)0/50/50/50/5
K.ESTIMATED BOTTOM BRACKET HEIGHT350/345350/345350/345350/345

Warranty Information for Transition:

ALL Transition frames are covered by our Unlimited Rider Support program. This program keeps you riding by providing discounted replacement frame parts or repair assistance in the event of damage - regardless of how it happened, or whether you're the original or a secondhand owner. If we are unable to replace or repair your frame part, we will work with you to find a suitable solution.
For full warranty policy please visit transition.com

Sizing Information
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