Shimano 105 FH-R7070 rear 12x142, Centrelock spoke length

J-bend, 32 hole. Flange diameter 44 mm left and 45 mm right, centre to flange 35.3 mm left and 20.4 mm right. Pick your rim in the calculator for your exact spoke lengths.

Rim

Choose the rim

ERD 591 mm, made in 24, 28 hole. Asymmetric: the spoke holes sit 3 mm off centre, allowed for in the lengths.

Washers under the nipples (optional), mm thick

Some alloy rims use them. Leave empty if you don't.

How to measure ERD yourself

Take two spokes of a known length and screw a nipple onto each until the thread end is flush with the top of the nipple. Drop them through opposite spoke holes so the nipples sit in the rim as they would in a built wheel. Pull them tight towards each other and measure the gap between the bent ends. ERD is the gap plus both spoke lengths.

Hub

Search hubs (optional)

Choose the hub (39 fit this rim)

J-bend. Flange diameter 57 / 59 mm, centre to flange 32 / 19.6 mm (left / right).

Hub not listed? Choose "Type in my hub", or tell me which one and I'll add it.

Lacing

Spoke holes

Crosses, left (disc side)

Crosses, right (drive side)

I've started you on 3-cross for 28 hole, which suits most wheels. Radial is only for a side that doesn't brake or drive: a rim-brake front, or the non-drive side of a rim-brake rear.

SpokesSpoke type

Used for the stretch, the weight and the ping note.

Tension, tighter side, kgf

Most wheels 100 to 130. Check your rim's limit.

Spokes come in

Allow for spoke stretch (spokes stretch a little once they're tight, thin ones most)

Spoke lengths

Check your rim and hub against the maker's sizes before you order spokes.

Rear wheel, 28 hole, J-bend spokes, 591 mm ERD.

Side	Spokes	Length
Left (disc side)3-cross	14	291 mm290.6 worked out
Right (drive side)3-cross	14	290 mm289.9 worked out

Rounded to the nearest mm. Between two sizes, go for the shorter one.

Tension: the left spokes run at 78% of the right side's tension. Bracing angles 5.7° left, 4.5° right.

Weight: these spokes and alloy nipples come to about 182 g (about 200 g with brass nipples).

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Will my spokes fit?

Left (disc side): spokes I have, mm

Right (drive side): spokes I have, mm

Nipple length

Ping tuner: what each side should sound like

B4, about 490 Hz at 86 kgf

C#5, about 561 Hz at 110 kgf

Pluck each spoke between the rim and where it last crosses another, and match the note. Every spoke on one side should sound the same. It's a guide to even tension by ear, not a tension meter.

Often needed with this wheel

A Garbaruk cassette
Lightweight 10-52 and 10-44 options for XD, MicroSpline and HG freehubs.
Nextie tubeless tape and valves
Ready for the tyre when the wheel is built.

These lengths come from the makers' published sizes and a standard sum. Rims and hubs vary from batch to batch, and sizes you put in yourself are only as good as your measuring. Travers Bikes takes no responsibility for spoke lengths worked out with this calculator, or for spokes, wheels or parts bought or built using them.

Shimano 105 FH-R7070 rear 12x142, Centrelock with common rims

J-bend lengths include the bend. Rounded to the nearest mm.
	Holes	Left	Right	Lacing
Nextie Ripple 60GS 700c	32	253 mm	251 mm	3-cross
Nextie Ocean 45G 700c	32	268 mm	267 mm	3-cross
Nextie SGV 39 700c	32	274 mm	273 mm	3-cross
Nextie SGV 44 700c	32	269 mm	268 mm	3-cross
Nextie SGV 49 700c	32	264 mm	263 mm	3-cross
Nextie SGV 54 700c	32	259 mm	258 mm	3-cross
Nextie SGV 59 700c	32	255 mm	253 mm	3-cross
Nextie SGV 64 700c	32	250 mm	248 mm	3-cross
Nextie SGX 30 700c	32	283 mm	282 mm	3-cross
Nextie SGX 35 700c	32	278 mm	277 mm	3-cross
DT Swiss RR 421 700c	32	294 mm	292 mm	3-cross
DT Swiss G 540 700c	32	289 mm	288 mm	3-cross
Velocity Aileron 700c	32	285 mm	284 mm	3-cross

Back to the spoke length calculator for how it works and how to measure your own parts.

A pair of Nextie carbon wheels built at Travers Bikes

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I hand-build wheels in Rochford with Nextie carbon rims and Hope, DT Swiss, Chris King, Shimano, Nextie and SON hubs. I work out the spokes and order them, so getting the length right is my job, not yours.

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