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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 25 Items.
Spool, Full Size, Steel, 40-Spline, 10-Bolt, Ford 9 in., Each
Part Number: STR-D2000
Estimated Ship Date: Today
Estimated Ship Date: Today
Spool, Full Size, Steel, 31-Spline, 10-Bolt, Ford 8.8 in., Each
Part Number: STR-D1558
Estimated Ship Date: Today
Estimated Ship Date: Today
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
Estimated Ship Date: Today
Estimated Ship Date: Today
Spool, Full Size, Steel, 35-Spline, 10-Bolt, Ford 9 in., Each
Part Number: STR-D1555
Estimated Ship Date: Today
Estimated Ship Date: Today
Spool, Lightweight, Pro Race, 35-spline, Steel, Ford 8.8 in., Each
Part Number: STR-D1567
Estimated Ship Date: Today
Estimated Ship Date: Today
Spool, Full Size, Steel, 31-Spline, 10-Bolt, Ford 9 in., Each
Part Number: STR-D1516
Estimated Ship Date: Today
Estimated Ship Date: Today
Spool, Full Size, Steel, 33-Spline, 10-Bolt, Ford 8.8 in., Each
Part Number: STR-D-1560
Estimated Ship Date: Today
Estimated Ship Date: Today
Spool, Pro Race, Lightweight, Steel, 35-spline, 12-bolt, GM 8.875 in., Passenger Car, Each
Part Number: STR-D1541
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Spool, Full, 30-spline, Steel, Toyota 8.0 (7.8) in., Each
Part Number: TGI-140164-1
Not Yet Reviewed
Estimated Ship Date: Jun 1, 2026 if ordered today
Estimated Ship Date: Jun 1, 2026 if ordered today
Spool, Full, 30-spline, Steel, Toyota 8.0 (7.8) in., Each
Part Number: TGI-140163-1
Estimated Ship Date: Jun 1, 2026 if ordered today
Estimated Ship Date: Jun 1, 2026 if ordered today
Spool, Full Size, Steel, 40-Spline, 10-Bolt, Ford 9 in., Each
Part Number: STR-D-2002
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Spool, Full Size, Steel, 30-Spline, Chrysler 8.75 in., Each
Part Number: STR-D1556
Estimated Ship Date: Today
Estimated Ship Date: Today
Spool, Full Size, Steel, 33-Spline, 12-Bolt, GM 8.875 in., Each
Part Number: STR-D1549
Estimated Ship Date: Today
Estimated Ship Date: Today
Spool, Fullsize, Aluminum, 31-spline, 2.032 in. Journal, PEM Quick Change, Each
Part Number: PE2-QCFSA31
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
