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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.

Individual Parts

Results 1 - 25 of 173

Spool, Lightweight, Pro Race, 35-spline, Steel, Ford 8.8 in., Each

Part Number: STR-D1567

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Mini Spool, 30-spline, Steel, GM 10.5 in. (14-bolt), Each

Part Number: ALY-GM14MSPL

4.13 out of 5 stars ( 8 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

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

Part Number: MGR-MS88-31

3.7 out of 5 stars ( 10 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Spool, Mini, Steel, 28-Spline, 10-Bolt, GM 8.5 in., Each

Part Number: SUM-730085

4.13 out of 5 stars ( 8 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Spool, Mini, Steel, 30-Spline, 12-Bolt, GM 8.875 in., Each

Part Number: SUM-730120

4.4 out of 5 stars ( 10 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Spool, Full Size, Steel, 31-Spline, 10-Bolt, Ford 9 in., (strip & track only), Each

Part Number: SUM-G7811

4.75 out of 5 stars ( 8 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

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

Part Number: STR-D2000

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Spool, Mini, Steel, 26-Spline, 10-Bolt, GM 7.5 in., Each

Part Number: MGR-MS75-26

4.8 out of 5 stars ( 25 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Spool, Mini, Steel, 28-Spline, GM 7.625 in., Each

Part Number: MGR-MS75-28

4.15 out of 5 stars ( 20 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

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

Part Number: STR-D1555

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Spool, Mini, Steel, 28-Spline, 10-Bolt, Ford 8.8 in., Each

Part Number: MGR-MS88-28

1.8 out of 5 stars ( 5 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Spool, Performance, Full, Steel, 30-spline, Dana 44, Each

Part Number: SDH-2023397

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

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: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Mini spool for GM 12 bolt with 30 spline axles

Part Number: YGA-32227

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Spool, Full Size, Steel, 35-Spline, 10-Bolt, Dana 60, For 4.10-6.50 Richmond and 4.56-7.17 Ratio Dana/Spicer Gear Sets, Each

Part Number: STR-D1548

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

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

Part Number: PE2-QCFSA31

Not Yet Reviewed

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Spool, Mini, Steel, 26-Spline, 10-Bolt, GM 7.5 in., Each

Part Number: RMG-78-7526-1

4.4 out of 5 stars ( 10 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Spool, Mini, Steel, 30-spline, 10-bolt, GM 8.5 in., Each

Part Number: YGA-32233

4.67 out of 5 stars ( 12 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

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

Part Number: MSR-5S9F35

Not Yet Reviewed

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Performance Mini Spool (GM 8.5 - 30 Spline)

Part Number: SDH-10015388

Not Yet Reviewed

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Spool, Full Size, Steel, 30-Spline, Chrysler 8.75 in., Each

Part Number: STR-D1556

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Spool, Mini, Steel, 28-Spline, 10-Bolt, GM 8.2 in., Each

Part Number: SUM-730082

4.6 out of 5 stars ( 10 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

Mini Spool, GM 7.5 in. 10-Bolt, Open Carrier, Equal Windows, 28-Spline, Each

Part Number: RMG-78-7528-1

Not Yet Reviewed

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026

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

Part Number: STR-D1558

4.33 out of 5 stars ( 6 )

Estimated Ship Date: Monday 2/9/2026

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Estimated Ship Date: Monday 2/9/2026