{"product_id":"ratchet-wrench-14mm-15mm","title":"Ratchet Wrench 14mm + 15mm","description":"\u003cp\u003eSquare-taper cranks haven't disappeared, and a workshop that services older road and city bikes runs through more of them than the catalog might suggest. The crank bolt on a square-taper crank is typically M8 with a 14 or 15 mm hex head (Sugino, Stronglight, TA, Shimano FC-7710-class); the same crank often pairs with a 14 mm crank-arm nut on the opposite end. Two sizes, one wrench, and the right tool keeps the install or removal moving without a tool change mid-job.\u003c\/p\u003e\n\u003cp\u003eThe 1621-1 in the 14 + 15 mm cut is the ratchet for that workflow. One head carries a 14 mm socket, the other carries a 15 mm socket; both at 3\/8\" drive, both with 75-tooth ratchet engagement. Loosen the crank bolt at one head, swap the wrench around, tighten the crank-arm nut at the other; no tool change, no fumbling for a 1\/2\" adapter, no shop-time lost.\u003c\/p\u003e\n\u003ch2\u003eHow the 75-tooth ratchet helps in tight quarters\u003c\/h2\u003e\n\u003cp\u003eA square-taper crank bolt is recessed into the crank arm's spider; the working space for the wrench head is constrained by the chainring, the chainstay, and the frame's BB shell. Standard ratchets with coarser tooth counts (36 or 45 teeth) need a wider swing arc to engage the next tooth, which means lifting the wrench off the bolt and re-setting after every few degrees of rotation. The 75-tooth engagement on the 1621-1 needs a 4.8° arc to advance one tooth; narrow enough to ratchet the bolt without pulling the wrench off, even on the most constrained square-taper installs.\u003c\/p\u003e\n\u003ch2\u003eSibling product\u003c\/h2\u003e\n\u003cp\u003eThe \u003ca href=\"\/products\/ratcheting-bottom-bracket-wrench-8mm-14mm\"\u003eRatchet Wrench 14 mm + 8 mm\u003c\/a\u003e covers the other common square-taper size pairing; a 14 mm socket plus an 8 mm hex driver for newer square-taper crank bolts with a recessed hex head. The two ratchets share the same body geometry and 75-tooth engagement; a shop that sees both vintage and current square-taper cranks runs both on the bench.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSquare-taper crank bolts with 14 or 15 mm hex heads (Sugino, Stronglight, TA, Shimano FC-7710-class)\u003c\/li\u003e\n\u003cli\u003e14 mm crank-arm nuts on the same crank\u003c\/li\u003e\n\u003cli\u003eOther M8-class fasteners in the same size range\u003c\/li\u003e\n\u003cli\u003eAny 3\/8\" drive socket for general use (the sockets are interchangeable on the ratchet body)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive:\u003c\/strong\u003e 3\/8\" square drive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRatchet engagement:\u003c\/strong\u003e 75 teeth (~4.8° arc per tooth)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead sizes:\u003c\/strong\u003e 14 mm and 15 mm sockets, integrated to the ratchet body\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e premium flex plus carbon steel, hardened and tempered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface finish:\u003c\/strong\u003e trivalent chrome plated per ISO 1456:2009\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e the dual-head ratchet itself\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuilt in Zreče\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The 1621-1 is the kind of tool a shop's mechanic reaches for without thinking; once the crank is in front of you, the 75-tooth engagement is what makes the rest of the job feel fast.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eSquare-taper crank bolts torque to 35–50 Nm (Shimano publishes the band; Sugino and Stronglight historically converge at the same range), which is above the comfort range for a hand-load ratchet wrench. The 1621-1 is the right tool for breaking the bolt loose and for spinning the bolt down quickly during reinstall; the final torque is a torque-wrench job, not a hand-feel job. Spin down with the ratchet, switch to a torque wrench for the final 35–50 Nm.\u003c\/p\u003e\n\u003cp\u003eFor the crank removal procedure including puller selection by spindle type: \u003ca href=\"\/blogs\/tech-tips\/how-to-remove-a-crankset\"\u003eHow to remove a crankset →\u003c\/a\u003e.\u003c\/p\u003e","brand":"Unior","offers":[{"title":"14mm \u0026 15mm","offer_id":44144831103020,"sku":"624942","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0012\/5786\/5260\/products\/1621_1abi-us.jpg?v=1642712359","url":"https:\/\/uniorusa.com\/products\/ratchet-wrench-14mm-15mm","provider":"Unior USA","version":"1.0","type":"link"}