SON 28 15x110 Boost, Centrelock spoke length

J-bend, 28, 32 hole. Flange diameter 59 mm left and 59 mm right, centre to flange 28 mm left and 28 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 (46 fit this rim)

J-bend. Flange diameter 59 / 59 mm, centre to flange 28 / 28 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

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.

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

Side	Spokes	Length
Left (disc side)3-cross	14	290 mm290.1 worked out
Right3-cross	14	291 mm290.7 worked out

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

Tension: the right spokes run at 81% of the left side's tension. Bracing angles 4.9° left, 6.1° 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: spokes I have, mm

Nipple length

Ping tuner: what each side should sound like

C#5, about 561 Hz at 110 kgf

B4, about 503 Hz at 89 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

kLite lights for the SON
ULTRA front lights and the bar switch loom that run straight from the hub. Pick the parts in the kit builder.
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.

SON 28 15x110 Boost, Centrelock with common rims

J-bend lengths include the bend. Rounded to the nearest mm.
	Holes	Left	Right	Lacing
Nextie Ripple 60GS 700c	28	255 mm	255 mm	3-cross
Nextie Ocean 45G 700c	28	270 mm	270 mm	3-cross
Nextie SGV 39 700c	28	276 mm	276 mm	3-cross
Nextie SGV 44 700c	28	271 mm	271 mm	3-cross
Nextie SGV 49 700c	28	266 mm	266 mm	3-cross
Nextie SGV 54 700c	28	261 mm	261 mm	3-cross
Nextie SGV 59 700c	28	256 mm	256 mm	3-cross
Nextie SGV 64 700c	28	251 mm	251 mm	3-cross
Nextie SGX 30 700c	28	285 mm	285 mm	3-cross
Nextie SGX 35 700c	28	280 mm	280 mm	3-cross
DT Swiss RR 421 700c	28	295 mm	295 mm	3-cross
DT Swiss G 540 700c	28	291 mm	291 mm	3-cross
Stan's Grail S1 700c	28	289 mm	289 mm	3-cross
Velocity Aileron 700c	28	287 mm	287 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

Want me to build it?

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.

Price a wheel build