Transition Bikes Product Support for Regulator SX 2025

Regulator SX
YEARS PRODUCED: 2025

You may view the exploded frame detail and purchase replacement parts for your frame below. To verify you have the correct frame, please make sure your serial number has the same first 7 characters listed below.

APPLICABLE SERIAL NUMBER RANGES: TBC5202xxx, TBC5203xxx,

REF #	DESCRIPTION PART # Torque Specs Other Notes	# IN FRAME	STOCK LEVEL	PURCHASE QTY	ADD TO CART	PRICE/EA
5	MAX Bearing: (6903) - Each P/N: 01.17.91.6903	2	All Available			$9.99
6	Main Pivot Spacer 17mm x 56mm (TRB-BSP-56L) - Each P/N: 01.23.92.0202	1	All Available			$6.00
7	Main Pivot Axle 17mm x 101mm (TRB-MAX-101L) - Each P/N: 01.23.92.0201 19nm (Apply Grease To Shaft & Blue Threadlock To Threads)	1	All Available			$18.00
8	Main Pivot Taper Nut (A6DA-CCP) - Each P/N: 01.18.92.0205 Apply Grease To Outer Surface	1	All Available			$6.00
9	Main Pivot Spacer (6x10x1T) - Each P/N: 01.18.92.0203	1	All Available			$0.50
10	Main Pivot Screw (M6-25L-P-S) - Each P/N: 01.18.92.0202 10nm (Apply Blue Threadlock)	1	All Available			$1.50
11	Bearing Spacer and Water Shield 15mm x 27mm x 2mm (CEG-SPA) - Each P/N: 01.25.98.4314	2	All Available			$5.00
12	MAX Bearing: (6802) - Each P/N: 01.17.91.6802	6	Out of Stock			$7.00
13	C-Clip 24mm (IRTW-24) - Each P/N: 01.20.92.0001	8	All Available			$2.00
14	Bearing Spacer 15mm x 23mm x 3mm (TRB-CWS) - Each P/N: 01.22.92.0004	8	All Available			$3.00
15	Chainstay Pivot Axle 15mm x 26mm V2 (TRB-CAX-26L) - Each P/N: 01.19.92.0101 Apply Grease To Shaft	2	All Available			$10.00
16	Chainstay Pivot Screw 12mm x 15mm V2 (TRB-SNT-15L) - Each P/N: 01.19.92.0102 12nm (Apply Blue Threadlock)	2	All Available			$10.00
17	Seatstay Pivot Axle 15mm x 20mm (TRB-CAX-20L) - Each P/N: 01.20.92.0402 Apply Grease To Shaft	2	All Available			$10.00
18	Seatstay Pivot Screw 12mm x 12mm (TRB-SNT-12L) - Each P/N: 01.20.92.0401 12nm (Apply Blue Threadlock)	2	All Available			$10.00
19	Rocker Pivot Screw 8mm x 40mm (MDEA-LBT) - Each P/N: 01.19.92.0303 Apply Blue Threadlock	1	All Available			$1.50
20	MAX Bearing: (6902) - Each P/N: 01.17.91.6902	2	All Available			$7.00
21	Bearing Spacer 15mm x 22mm x 3mm (TEDC-BWS) - Each P/N: 01.18.92.0004	2	All Available			$3.00
22	Rocker Pivot Axle 15mm x 38mm (TSCF-LAX) - Each P/N: 01.20.92.0301 15nm (Apply Grease To Shaft)	2	All Available			$10.00
23	MAX Bearing: (6900) - Each P/N: 01.17.91.6900	2	All Available			$7.00
24	Trunnion Shock Spacer 10mm x 6mm (TSC-SWS) - Each P/N: 01.18.92.0005	2	All Available			$2.50
25	Trunnion Shock Bolt Washer V2 (TSCF-SCP) - Each P/N: 01.19.92.0508	2	All Available			$5.00
26	Trunnion Shock Bolt V2 10mm x 24mm (TSC-TRC-24L) - Each P/N: 01.19.92.0506 12nm (Apply Blue Threadlock)	2	All Available			$10.00
27	Shock Bolt 8mm x 41mm V2 (TRB-BT-41L-S) - Each P/N: 01.19.92.0500 Apply Grease To Shaft	1	All Available			$10.00
28	Shock Screw V2 (TRB-M6-S) - Each P/N: 01.19.92.0505 10nm (Apply Blue Threadlock)	1	All Available			$5.00
29	37mm Bolt On Seatpost Collar (TRA-CLP) - Includes Screw P/N: 01.19.16.3700 5-7nm	1	Out of Stock			$15.00
32	Regulator Motor Mount Nut (TRF08-MNT) P/N: 01.25.98.0009	2	All Available			$12.00
33	Headtube Cable Guide Base Left (TRF-07-HGL) P/N: 01.25.98.4307	1	All Available			$5.00
34	Headtube Cable Guide Base Right (TRF-07-HGR) P/N: 01.25.98.4306	1	All Available			$5.00
35	Cable Guide Single Cable Right (TRF-07-HGS-A) P/N: 01.25.98.4309	1	All Available			$5.00
36	Cable Guide Single Cable Left (TRF-07-HGS-B) P/N: 01.25.98.4308	1	All Available			$5.00
37	Cable Guide Double Cable (TRF-07-HGD) P/N: 01.25.98.4310	1	All Available			$5.00
38	Cable Guide Full Cover (TRF-07-HGFC) P/N: 01.25.98.4311	1	All Available			$5.00
39	Screw Bolt: M4x10L-M-SB P/N: 01.25.98.0014	2	All Available			$1.50
40	Regulator Bosch SX Motor Cover (TRF09-MCV) P/N: 01.25.98.0008	1	All Available			$16.00
41	Chainstay Protector: Regulator SX (TRF09-CPT) P/N: 01.25.98.0007	1	All Available			$15.00
42	Seatstay Protector: Regulator (TRF08-SPT) P/N: 01.25.98.0010	1	All Available			$12.00
43	Main Pivot Fender: Regulator (TRF08-MFD) P/N: 01.25.98.0011	1	All Available			$12.00
44	Regulator System Controller Adapter (TRF08-HAP) P/N: 01.25.98.0012	1	All Available			$3.00
45	Bottom Bracket Cable Guide Regulator SX (TRF09-BCG) P/N: 01.25.98.0001	1	All Available			$8.00
48	Screw Bolt: M3X10L-M-BK P/N: 01.25.98.0015	4	All Available			$2.00
49	Regulator Charge Port Mounting Insert (TRF08-CHP) P/N: 01.25.98.0020	1	All Available			$16.00
50	Regulator Charge Port Base (TRF08-PLG) P/N: 01.25.98.0021	1	All Available			$8.00
51	Regulator Charge Port Cover (TRF08-RCV) P/N: 01.25.98.0022	1	All Available			$8.00
52	Screw Bolt: PPM3-12L-M-SB (Course Thread) P/N: 01.25.98.0023	1	All Available			$1.50
53	Screw Bolt: M5X10L-CS P/N: 01.25.98.0016 5nm (Apply Blue Threadlock)	2	All Available			$3.00
54	Chain Guide Assembly: Regulator (TRF08-CG) P/N: 01.25.98.0017	1	All Available			$8.00
55	Chain Guide Plate: Regulator SX 32T (TRF09-CGP) P/N: 01.25.98.0019	1	All Available			$16.00
56	Screw Bolt: M5X10L-M-SB P/N: 01.25.98.0025	2	All Available			$3.00
57	Chainguide Screw (M5X18L-P-SB) P/N: 01.25.98.0006	1	All Available			$3.00
58	Universal Derailleur Hanger - Aluminum (SRAM UDH) P/N: 01.23.93.0001	1	All Available			$20.00
58	Universal Derailleur Hanger (SRAM UDH) P/N: 01.21.93.0001	1	All Available			$15.00
59	12x148 Rear Axle 2 pcs (Frames w/ UDH) (TRB-HAX A29C-WS) P/N: 01.21.51.0148 10-12nm Includes A29C-WS (Apply Grease To Shaft & Threads)	1	All Available			$30.00
60	Rear Axle Collet For TRB-HAX (A29C-WS) - Each P/N: 01.21.51.0149 Collet Section Only - No Axle Included	1	All Available			$8.00
61	Internal Cable Grommet - Each P/N: 01.14.98.2929	1	All Available			$8.00
62	Internal Cable Grommet (Closed) - Each P/N: 01.25.98.4313	1	All Available			$5.00
99	Powermore Cable Holder (TRF08-REH) P/N: 01.25.98.0032	1	Out of Stock			$8.00

REAR TRAVEL:	150mm (Compatible with 160mm)

FRONT TRAVEL:	160mm

WHEEL SIZE:	29" Front / 27.5" Rear

SIZES:	SM, MD, LG, XL

FRAME BEARINGS:	2x 6903, 2x 6902, 6x 6802, 2x 6900

FORK AXLE TO CROWN:	579mm

FORK OFFSET:	44mm

REAR SHOCK SIZE:	205mm x 60mm (compatible with 205 x 65mm)

SHOCK HARDWARE:	Trunnion Mount Top / 30mm x 8mm Bottom

HEADSET (TOP):	44mm Zero Stack

HEADSET (BOTTOM):	56mm Zero Stack

BB SHELL:	73mm BSA Threaded

CHAINLINE:	55mm

REAR BRAKE MOUNT:	180mm Post Mount, Max Rotor Size 223mm

REAR AXLE:	Transition Axle For UDH, 12mm x 148mm Spacing

ISCG TABS:	ISCG05

SEATPOST DIAMETER:	31.6mm

SEAT CLAMP:	Carbon: 37.0mm

MAX SEATPOST INSERTION:	Small 235mm \| Medium 260mm \| Large 300mm \| X-Large 330mm

MAX CHAINRING SIZE:	34T Standard Single Ring

MAX TIRE SIZE:	27.5" x 2.5" (*see FAQ)

REAR SHOCK SAG:	150mm/60mm: 16-20mm (26-32%)

WARRANTY POLICY

At Transition Bikes, we take pride in the quality of our products. Our frames are manufactured to withstand the rigors and abuse modern mountain bike trails can dish out. That said, anything can break given just the right amount of time, wear, or misfortune. Everyone here at Transition Bikes is committed to keeping you riding and we realize every warranty and or crash replacement situation is unique. You have our guarantee that we will do our best to make sure we keep you riding while limiting any downtime.

The Regulator SX, released in 2025, is covered for life against manufacturing defects. This policy applies to original owners only. Transition Bikes will repair or replace any original purchaser's individual frame parts or complete frame at our discretion.

If you did not purchase the bike directly from us, you must register your frame on our site with your serial number and provide proof of purchase to qualify for a warranty. In the event of an issue with your frame, Transition Bikes will determine whether it qualifies as a ‘Warranty Issue’ or is covered under our ‘Crash Replacement Policy’ (see below for details).

In the event that you have to send back all or part of your frame under warranty, you are responsible for the shipping costs to get it to us, and we will pay the return shipping.

*Our warranty policy does not cover:
Any labor costs associated to the warranty claim.
Modifications from stock configuration.
Normal wear-and-tear damage.
Paint damage caused by the removal of protective tapes or adhesives.

CRASH REPLACEMENT

In addition to our warranty, all Transition Bikes frames are covered for life under our “Crash Replacement Policy” to the original or second hand owner. If for any reason you should find yourself with a damaged frame, you may send us the broken frame section, and we will replace it for the best possible price we can, assuming we have the replacement part available. If we do not have the piece available, we will attempt to work out a crash replacement price on a replacement frame set. The customer is responsible for all shipping costs to get the frame to and from Transition Bikes.

WE GET IT, PEOPLE WHO RIDE OUR BIKES RIDE HARD

Above is our official stance, since to some degree these things need to be spelled out. But our entire philosophy is based around being a rider-owned company, and we take that seriously. We're well aware that not every circumstance can be accounted for, and not every case falls neatly into one of the above categories. We look at every warranty and crash replacement case with a fresh lens and treat every situation in the manner in which we would expect it to be handled. Our goal is to leave no rider who supports us without support in return.

WARRANTY/CRASH REPLACEMENT CLAIM FORM

To submit a Warranty/Crash Replacement Claim within the United States or Canada, you must have an account with us. To sign in to your existing account or create a new account, follow this link. Once you are signed in, click on Warranty Claims to submit a claim. Our International Distributors handle warranty cases outside the United States and Canada. Please contact your region's distributor to get a claim started. If you have any other questions regarding our warranty or crash replacement policies, please email us at warranty@transitionbikes.com or call us by phone, at (360) 230-8596.

Can I buy an eMTB frameset with only the frame, motor, and battery?

No, eMTB models are only available as a complete bike to ensure performance, reliability, and support. Under no circumstance will we sell any eMTB model as a frameset or in a partial configuration.

Can I connect my Garmin/Wahoo/Hammerhead to the Bosch Smart system?

No, the Bosch Smart system is not currently compatible with any third-party cycling computers, but you can track your ride through the Flow App.

Can I easily swap the battery or remove it for charging?

No, the battery is fixed inside of the downtube and is not intended to be easily removed. Removal is possible but involves removing the drive unit and other components.

Can I power the bike using ONLY the range extender?

The main battery must be charged in order to use a range extender. The range extender and main battery are depleted in parallel. For example - it is not possible to drain the main battery, then install the range extender and get another lap.

Can I remove or substitute any parts when I buy a frame or complete bike?

We are not able to remove, substitute or modify any parts included with a frame or complete bike. All parts specified will be included with your purchase.

Can I run a 29" rear wheel on the Regulator?

No, the Regulator is not compatible with a 29" rear wheel.

Can I try a bike before I buy?

We offer three ways to demo a bike. If you find yourself in Bellingham, you can follow this link to schedule a demo through the Outpost. If you live somewhere else, you can follow this link to see what shops currently have demo bikes available. And finally, you can view our events page, located here to see which upcoming demo events we'll be participating in.

Do you offer financing?

We provide easy and affordable financing through our partner, Bread, so you can pay for your purchase over time. This option is only available in the USA at this time.

How do I see the charge level of my Regulator battery?

The five charge level LEDs indicate the charge level. A pale blue bar corresponds to approx. 20%, a white bar approx. 10 %. In addition, the display turns orange below 30% and red below 10%. Flashing red flashing at 0 % indicates that motor support is no longer available, but that there is still reserve power for light. Source: Bosch eBike Help Center

Is the Bosch Smart system covered under warranty?

Yes, all Bosch Smart system components are covered under warranty for two-years from the purchase date.

Is there a Bosch App?

Yes! The Bosch Flow App allows you to track and fine-tune your ride, as well as view your battery percentage.

Is there a range extender for the Regulator?

Yes. The range extender is compatible with ALL sizes of the Regulator SX, and MD-XL of the Regulator CX. Please reach out to us or your local bike shop for pricing and availability!

What is the estimated range of the Regulator?

There are many factors in play here, and Bosch has accounted for most of them! Check out the sweet Bosch range calculator HERE

What is the maximum rear tire size?

We list a guideline tire size for each frame, but the real answer is: it depends. Tire brand, tread pattern, rim width, conditions, and how aggressively you ride all play a role. Wider rims can make tires measure larger, and there’s variability between sizes and manufacturers (not all 29” x 2.4” tires are created equal).

If you ride in mud, you'll need extra clearance to avoid packing up. If you push the bike hard, you could flex the rear wheel enough to cause tire rub on the rear triangle—even if you think you’ve got plenty of clearance.

So, what's the takeaway? Please use common sense. If your wheel is properly dished, trued, and tensioned and your tire is rubbing hard enough to damage the frame, you’re probably running too big of a tire.

What is the warranty policy for this model?

This frameset is covered for life against manufacturing defects for the original owner and comes with a lifetime crash replacement policy. You can read more about our warranty and crash replacement policy on our Support Page.

What size do I need?

Looking for a little giddy-up in your life, but not sure what size you need? Take a look at our human specific sizing guide located here.

Will installing frame protection affect the warranty?

Installing frame protection will not affect your warranty, but we do caution against installing it on neon or brightly-colored models as these paints are more susceptible to discoloration and fading. Paint fade is not covered under our factory warranty.