When does the chain on a SPEEDHUB bike need replacing?

When the S side of the Rohloff Caliber 2 drops fully between the chain's rollers — 0.1 mm of wear per link, for steel sprockets and chainrings. With an aluminium chainring, the A side (0.075 mm) is already the signal. Changed in time, sprocket and chainring last much longer.

What torque do the SPEEDHUB's bolts take?

Most M4 screws — axle plate, shell cover, cable box — take 3 Nm with a TX20 Torx. The oil drain screw takes 0.5 Nm, the brake disc bolts 10 Nm, the TS axle nuts 35 Nm and the A12 bolt 15–20 Nm. The full table is in this article.

Tools and bolts

Tightening torques

Unit	Bolt	Art. no.	Size	Torque	Tool
Axle plate	axle plate screws	8236	M4×25	3 Nm	TX20
Shell cover	shell cover screws	8237	M4×10	3 Nm	TX20
External actuation	cable box cover screws	8237	M4×10	3 Nm	TX20
External actuation	guide pin screws	8215	M4	3 Nm	TX20
Twist shifter (8206)	clamp screws	8192	M3×12	2 Nm	TX20
Twist shifter, old (8200)	clamping screws	8204	M5×8	1 Nm	2.5 mm Allen
Twist shifter, old (8200)	cable stop screws	8203	M4×16	3 Nm	TX20
Chain tensioner	stop pin screws	—	M4×10	3 Nm	TX20
Chain tensioner	pulley axle screw	—	M4	3 Nm	TX20
CC chain guide	bushing and clamp screws	—	M4×20 / M4×35	3 Nm	TX20
Internal actuation	bayonet screws	8570	M4×4	1.5 Nm	2 mm Allen
External actuation	cable pulley screws	8570	M4×4	1.5 Nm	2 mm Allen
DH chain guide	fixing screws	—	M4×8	1.5 Nm	2 mm Allen
Oil change	oil drain screw	8205	—	0.5 Nm	3 mm Allen
Cable stop	fixing screw	—	M6	6 Nm	4 mm Allen
Long torque arm (TS)	frame clamp	8241	M6×12	6 Nm	4 mm Allen + 10 mm
SPEEDBONE / MonkeyBone	fixing screws	—	M6×25	6 Nm	5 mm Allen
Long torque arm	fixing screws	8231	M8	7 Nm	5 mm Allen
Brake disc	fixing bolts	8214	M8×0.75	10 Nm	5 mm Allen
Chain tensioner and DH tensioner	frame bolt and pivot	8257	M8	8 Nm	5 mm Allen
Splined Carrier L	lock ring	8538	—	30 Nm	lock ring tool (8518)
A12 axle system	A12 bolt	8569, 8569B, 8569U	M7×1	15–20 Nm	5 mm Allen
TS axle	axle nuts	8263	M10×1	35 Nm	15 mm spanner
CC axle	quick release	—	—	7 Nm (hand-tight)	—
Long torque arm (CC)	clamp bands	8262	—	2.5 Nm	screwdriver

Tools

Tool	For
TX20 Torx, T-handle (Art. no. 8504)	most of the SPEEDHUB’s screws
2, 2.5, 3, 4 and 5 mm Allen keys	see the table
8 mm ring or socket spanner	turning the shift shaft
7 and 10 mm ring or open spanners	the chain guide and frame clamp nuts
13 mm spanner	the internal actuation’s cable stop
15 mm spanner	the TS axle nuts
17 mm spanner	the aluminium nut — to hold the axle
24 mm spanner and chain whip	for the sprocket remover
sprocket remover (Art. no. 8501, 8508, 8509)	removing the sprocket
lock ring tool (Art. no. 8518)	removing the lock ring (Gates sprocket or splined sprocket with Carrier L)
165 mm brass tube (Art. no. 8711)	shortening the cables, internal actuation
200 mm brass tube (Art. no. 8712)	shortening the cables, external actuation
measuring gauge (Art. no. 8506)	shortening the cables, internal actuation
carrier removal tool (Art. no. 8522)	removing a stuck Splined Carrier — only with the 8518 and an impact driver
Rohloff Caliber 2 (Art. no. 3000)	measuring chain wear

Measuring chain wear

A chain stretches, and a stretched chain wears the sprocket and chainring too. The Rohloff Caliber 2 shows on any 1/2” × 3/32” chain when it is due: put its recess on a roller and swing the gauge tip towards the chain. On a new chain the tip only just fits between the rollers — the more worn the chain, the deeper it drops in.

If it drops fully in on side …	wear per link	replace the chain if …
A	0.075 mm	you have an aluminium chainring
S	0.1 mm	it runs only on steel — like the SPEEDHUB’s sprocket

Changed in time, the chain lets sprocket and chainring last far longer. On turning the sprocket round: Sprocket: turning, replacing, splined.

The service box

For workshops, the Rohloff service box (Art. no. 8700) keeps the SPEEDHUB parts and tools needed most often in one place. Its contents since October 2018:

Art. no.	Item	Qty
8190	grip rubber, “light” twist shifter	1
8191	1 and 14 cable stops, “light” twist shifter	2
8193	clamp and Torx screws, “light” twist shifter	1
8205	oil drain screw	1
8217	EX cable box cover with knurled screw	1
8231	torque arm fixing bolt with washers	1
8236	axle plate screws TX20 (6)	2
8243	chainring spacers (set of 5)	1
8251	tensioner pulleys (pair)	1
8257	long frame bolt and spacers for the tensioner	1
8262	clamp straps for the long torque arm (pair)	1
8263	TS axle nuts M10×1 with washers (pair)	1
8271	internal hub cable with bellows and cable ties (set)	1
8273	bayonet connector (2)	1
8275	freewheel springs (pair)	1
8295	SPEEDHUB 500/14 manual	1
8410	oil change kit	1
8504	Torx TX20 key, T-handle	1
8506	cutting gauge, internal actuation	1
8508	sprocket remover 135/142/170/177 mm	1
8518	lock ring tool with lock ring	1
8540	Splined Carrier with circlip	1
8540L	Splined Carrier L with lock ring	1
8540S	narrow Splined Carrier with circlip	1
8544	splined sprocket, 16 teeth	1
8570	grub screws for bayonet and cable drum (pair)	1
8573	Schaltseil-Easy-Set (from serial number 25,300)	1
8701	empty box	1
8704	cable adjusters with counter-support (pair)	1
8706	washer and circlip for the tensioner	1
8707	pin and washer for the fork end	1
8709	bayonet springs (pair)	1
8710	paper gaskets for the axle ring (2)	1
8713	cable cutting set, brass tubes 165 + 200 mm	1

Frequently asked questions

When does the chain on a SPEEDHUB bike need replacing?: When the S side of the Rohloff Caliber 2 drops fully between the chain's rollers — 0.1 mm of wear per link, for steel sprockets and chainrings. With an aluminium chainring, the A side (0.075 mm) is already the signal. Changed in time, sprocket and chainring last much longer.
What torque do the SPEEDHUB's bolts take?: Most M4 screws — axle plate, shell cover, cable box — take 3 Nm with a TX20 Torx. The oil drain screw takes 0.5 Nm, the brake disc bolts 10 Nm, the TS axle nuts 35 Nm and the A12 bolt 15–20 Nm. The full table is in this article.