Bike Tool Set in Tool Tray — Crank, Cassette & Freewheel Tools (1600SOS25)

Drivetrain service is the highest-volume work in most bike shops, and the tool count to service every drivetrain that walks in is large enough that a generic toolbox runs out before the bench has covered Shimano, SRAM AXS, Campagnolo, and the legacy Suntour freewheels still on older bikes. The Unior 1600SOS25 tray bundles the drivetrain-tool inventory into a single foam-cut drawer: 19 drivetrain tools covering chain replacement, crank service, cassette/freewheel removal, and bottom-bracket fitment up to the BB shell.

What’s in the tray

Chain service:

• Crank cap tool (1609.1); Shimano Hollowtech II crank-bolt preload cap.
• Crank cap tool for SRAM DUB (1609.2DUB/5); DUB-specific preload cap geometry.
• Pro pedal wrench (1613/2BI-US); 15 mm thin-profile wrench for road pedal installation.
• Chain wear indicator (1644/6); 0.5%/0.75% three-point gauge, reads modern 11+-speed and legacy 6–10-speed chains.
• Master chain tool (1647/2BBI-US); multi-format chain breaker covering 6–13 speed plus AXS Flattop via the modular insert system.

Crank service:

• Crank puller (1661/4); square taper crank-arm removal.
• Tapered crank puller (1662/4); alternative tapered-spindle crank-arm removal.

Cassette and freewheel removal:

• Freewheel removal tool (1670.1/4); standard freewheel splines.
• Freewheel remover Suntour® (1670.2/4 and 1670.3/4); two Suntour-specific freewheel patterns (the legacy Suntour mechanic catalog).
• Campagnolo cassette lockring tool (1670.4/4); Campagnolo lockring spline pattern.
• Cassette lockring tool (1670.5/4); Shimano HG / SRAM HG / Shimano Micro Spline / SRAM XD / XDR pattern.
• Freewheel remover for BMX® (1670.6/4); BMX freewheel spline pattern.
• Cassette lockring tool with 12mm guide pin (1670.9/4); for 12 mm thru-axle hubs.
• Chain whip, multispeed (1660/2DP-US); for cassette removal alongside the lockring tool.
• Cassette wrench (1670/2BI-US); for first-cog cassette holding.
• Cassette wrench for SRAM X-range (1670/2BI-AXS-US); 10-tooth-specific X-range cassette wrench.

Bottom bracket:

• Cartridge bottom bracket wrench (1671.8/2BI-US); cartridge BB removal.

Master link service:

• Master Link pliers (1720/4DP); open/close quick-link chain connectors.

Ratchet handle:

• Reversible ratchet 1/2” (190.1/1ABI-US); for the BB and cassette socket tools.

Why this is a complete drivetrain tray

Most drivetrain service jobs draw on tools from chain, crank, cassette, and BB categories simultaneously. A worn-chain replacement that reveals a worn cassette also benefits from a master-link verification, often a crank cap retightening, and sometimes a BB inspection. The 1600SOS25 keeps every tool that workflow needs in one drawer; pull the tray, do the service, slide the tray back.

Companion trays in the modular series:

• 1600SOS21; Hanger Alignment & Cable Pliers
• 1600SOS23; Sockets, Ratchets & Torque Wrench
• 1600SOS24; Cone Wrenches
• 1600SOS26; Bottom Bracket, Spoke & Brake Tools
• 1600SOS27; Hex/Torx T-Handles & Screwdrivers

Compatibility

Fits the full-width drawer slot in Unior’s tool carriages: Hercules, Eurovision, Eurostyle, Euromotion, and Europlus.

Built in Zreče, Slovenia

Unior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The Master Chain Tool 1647/2BBI in this tray is the same chain tool SRAM lists as Flattop-compatible in their service-archive compatibility document; the modular-insert system Unior originated, not a re-badge of a generic chain tool.

Pro tip from our mechanics

The 1600SOS25 is the right purchase for shops that bill drivetrain service as a primary revenue line. Cassette swap, chain replacement, BB removal, and crank service all happen in the same drawer-pull. Our broader workshop-tool-allocation guide covers the trade-offs between bundle tray purchases and individual-tool purchases: How to set up a professional bike workshop →