Summit Racing SpeedCard - learn how to get 15% back up to $150

Summit Racing SpeedCard - learn how to get 15% back up to $150

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Full Spools and Mini Spools

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Full Spools and Mini Spools

You don’t want to be a one-tire fryer at the track, and welds can weaken your axles—full spools and mini spools are the stronger way to lock your axles together...

You don’t want to be a one-tire fryer at the track, and welds can weaken your axles—full spools and mini spools are the stronger way to lock your axles together for maximum traction!

Spools (also called full spools) replace your differential carrier and lock the left and right axles together. There are no moving parts, they add support to the ring gear, and they can save unsprung weight.

Mini spools fit inside an existing open differential, replacing the side and spider gears. They’re usually less expensive, but aren’t as strong as full spools.

Top Brands


For maximum traction, shop for spools and...

You don’t want to be a one-tire fryer at the track, and welds can weaken your axles—full spools and mini spools are the stronger way to lock your axles together for maximum traction!

Spools (also called full spools) replace your differential carrier and lock the left and right axles together. There are no moving parts, they add support to the ring gear, and they can save unsprung weight.

Mini spools fit inside an existing open differential, replacing the side and spider gears. They’re usually less expensive, but aren’t as strong as full spools.

Top Brands


For maximum traction, shop for spools and mini spools at Summit Racing Equipment—find your axle size below. Summit carries trusted name brands like Strange Engineering, Yukon Gear, Dana Spicer, Motive Gear, Moser, Allstar, and more.

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Individual Parts

Results 1 - 3 of 3

PROFILED SPOOL

Part Number: MSR-5S12354P

Not Yet Reviewed

Estimated Ship Date: Feb 18, 2026 if ordered today

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Estimated Ship Date: Feb 18, 2026 if ordered today

Spool, Full Size, Steel, 35-Spline, 4 Series, 12-Bolt, GM 8.875 in., Each

Part Number: MSR-5S12354

Not Yet Reviewed

Estimated Ship Date: Feb 18, 2026 if ordered today

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Estimated Ship Date: Feb 18, 2026 if ordered today

12 BOLT 35 SPLINE TRUCK SPOOL

Part Number: MSR-5S12354T

Not Yet Reviewed

Estimated Ship Date: Feb 18, 2026 if ordered today

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Estimated Ship Date: Feb 18, 2026 if ordered today

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