{"product_id":"park-tool-bbt-135-12-steel-bottom-bracket-tool","title":"Park Tool BBT-135-12 Steel Bottom Bracket Tool","description":"\u003cdiv style=\"font-family:Arial,Helvetica,sans-serif; line-height:1.5; color:#222;\"\u003e\n\u003cp\u003eThe Park Tool BBT-135-12 Steel Bottom Bracket Tool is a heavy-duty workshop tool machined from precision 4140 steel for removal and installation of threaded bottom brackets with 12-notch tool fittings. The BBT-135-12 fits 12-notch fittings with a major diameter of 48–50mm and a minor diameter of 46.3mm, including Praxis Works M30 bottom brackets — a standard found across a wide range of contemporary road and gravel drivetrains. The extra-deep body handles extra-wide spindles, and low-profile walls at the engagement point seat into recessed lockrings that standard-depth tools miss. Three drive options — 3\/8\" drive, 1\" hex, and 36mm wrench flats — handle even heavily seized cups, and integrated threads in the tool body accept the Park Tool BBT-RS Bottom Bracket Tool Retaining System or GPS-1 Guide Pins (each sold separately) for improved stability during service.\u003c\/p\u003e\n\u003cul style=\"margin:0 0 0 18px; padding:0;\"\u003e\n\u003cli\u003eMachined from 4140 steel for heavy-duty workshop use\u003c\/li\u003e\n\u003cli\u003eFits 12-notch threaded bottom bracket tool fittings with a major diameter of 48–50mm and a minor diameter of 46.3mm\u003c\/li\u003e\n\u003cli\u003eCompatible with Praxis Works M30 bottom brackets\u003c\/li\u003e\n\u003cli\u003eExtra-deep body accommodates extra-wide spindles\u003c\/li\u003e\n\u003cli\u003eLow-profile walls at the point of engagement reach recessed lockrings\u003c\/li\u003e\n\u003cli\u003eThree drive options: 3\/8\" drive fitting, 1\" hex fitting, and 36mm wrench flats\u003c\/li\u003e\n\u003cli\u003eOuter diameter at point of engagement: 57.5mm (2.264\")\u003c\/li\u003e\n\u003cli\u003eInternal clearance: 42mm (1.654\") depth x 30.44mm (1.198\") diameter\u003c\/li\u003e\n\u003cli\u003eIntegrated threads accept Park Tool BBT-RS or GPS-1 Guide Pins for added stability (each sold separately)\u003c\/li\u003e\n\u003cli\u003eNot rated for use with impact drivers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Park Tool","offers":[{"title":"Default Title","offer_id":48605499883674,"sku":"BBT-135-12","price":52.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0327\/4483\/3156\/files\/TL2409.jpg?v=1783007357","url":"https:\/\/velomine.com\/products\/park-tool-bbt-135-12-steel-bottom-bracket-tool","provider":"Velo Mine","version":"1.0","type":"link"}