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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.

Showing In Stock Items. Show All 31 Items.

Individual Parts

Part Groups

Results 1 - 9 of 9

Trail-Gear Mini Spools 141043-3-KIT

Trail-Gear Mini Spools 141043-3-KIT

Trail-Gear Mini Spools 141043-3-KIT

Mini Spool, 26-spline, Steel, Rear, Suzuki, Each

Part Number: TGI-141043-3-KIT

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Moser Engineering Full Spools 5S9F40

Moser Engineering Full Spools 5S9F40

Moser Engineering Full Spools 5S9F40

Spool, Full Size, Steel, 40-Spline, 10-Bolt, Ford 9 in., Each

Part Number: MSR-5S9F40

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Moser Engineering Full Spools 5S8831

Moser Engineering Full Spools 5S8831

Moser Engineering Full Spools 5S8831

Spool, Full Size, Steel, 31-Spline, 10-Bolt, Ford 8.8 in., Each

Part Number: MSR-5S8831

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

PEM Racing Quick-Change Full Spools QCFSA31

PEM Racing Quick-Change Full Spools QCFSA31

PEM Racing Quick-Change Full Spools QCFSA31

Spool, Fullsize, Aluminum, 31-spline, 2.032 in. Journal, PEM Quick Change, Each

Part Number: PE2-QCFSA31

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

Moser Engineering Full Spools 5S9F35

Moser Engineering Full Spools 5S9F35

Moser Engineering Full Spools 5S9F35

Spool, Full Size, Steel, 35-Spline, 10-Bolt, Ford 9 in., Each

Part Number: MSR-5S9F35

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

Moser Engineering Full Spools 5S12333

Moser Engineering Full Spools 5S12333

Moser Engineering Full Spools 5S12333

Spool, Full Size, Steel, 33-Spline, 3 Series, 12-Bolt, GM 8.875 in., Passenger Car, Each

Part Number: MSR-5S1233-3

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Moser Engineering Full Spools 5SD404

Moser Engineering Full Spools 5SD404

Moser Engineering Full Spools 5SD404

Spool, Full Size, Steel, 40-Spline, 10-Bolt, Dana 60, Each

Part Number: MSR-5SD404

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

Allstar Performance Ultra-Lite Spools ALL68066

Allstar Performance Ultra-Lite Spools ALL68066

Allstar Performance Ultra-Lite Spools ALL68066

Spool, Ultra-Lite, Steel, 31-Spline, Ford 9 in., Each

Part Number: AAF-ALL68066

Not Yet Reviewed

Estimated Ship Date: Feb 27, 2026 if ordered today

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Estimated Ship Date: Feb 27, 2026 if ordered today

Allstar Performance Ultra-Lite Spools ALL68062

Allstar Performance Ultra-Lite Spools ALL68062

Allstar Performance Ultra-Lite Spools ALL68062

Spool, Ultra-Lite, Steel, 28-Spline, Ford 9 in., Each

Part Number: AAF-ALL68062

Not Yet Reviewed

Estimated Ship Date: Feb 27, 2026 if ordered today

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Estimated Ship Date: Feb 27, 2026 if ordered today

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