First Components Bottom Bracket One-Piece Kit
- 1599
First Components Bottom Bracket One-Piece Conversion Kit.
- Includes spindle, bearing rings, bottom bracket cups, nuts, and lockrings.
- Conversion Fitment: Square Tapered
- Brand: First Components
- Size: 51.5x128mm
- Uses: Perfect for single speed or fixed gear conversions using vintage road bikes with one-piece cranks. Converts existing bottom bracket to square tapered fitment.
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{"id":9038630093038,"title":"Shimano Square Tapered Bottom Bracket","handle":"shimano-square-tapered-bottom-bracket","description":"\u003cp\u003eThe quality and performance-oriented Shimano BB-UN300 cartridge bearing bottom bracket features a JIS square taper mount and is designed for frames with BSA thread and 68 mm shell width. A stabilizer ensures a constant chain line.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBB type: Square Taper\u003c\/li\u003e\n\u003cli\u003eFits: JIS Square Taper\u003c\/li\u003e\n\u003cli\u003eQuantity: 1\u003c\/li\u003e\n\u003c\/ul\u003e","published_at":"2025-11-18T21:27:51-08:00","created_at":"2025-11-14T11:29:17-08:00","vendor":"Plenty of Bikes","type":"Bottom Brackets","tags":["Brand_Shimano","Parts"],"price":2499,"price_min":2499,"price_max":2499,"available":true,"price_varies":false,"compare_at_price":2499,"compare_at_price_min":2499,"compare_at_price_max":2499,"compare_at_price_varies":false,"variants":[{"id":47205169889518,"title":"68 x 115mm","option1":"68 x 115mm","option2":null,"option3":null,"sku":"210000016435","requires_shipping":true,"taxable":true,"featured_image":{"id":45339574599918,"product_id":9038630093038,"position":1,"created_at":"2025-11-14T11:29:16-08:00","updated_at":"2025-11-14T11:29:17-08:00","alt":null,"width":400,"height":400,"src":"\/\/www.plentyofbikes.com\/cdn\/shop\/files\/w2z9pgjp6jqop6pub3w5.jpg?v=1763148557","variant_ids":[47205169889518]},"available":true,"name":"Shimano Square Tapered Bottom Bracket - 68 x 115mm","public_title":"68 x 115mm","options":["68 x 115mm"],"price":2499,"weight":454,"compare_at_price":2499,"inventory_quantity":1,"inventory_management":"shopify","inventory_policy":"deny","barcode":"192790619255","featured_media":{"alt":null,"id":37170420973806,"position":1,"preview_image":{"aspect_ratio":1.0,"height":400,"width":400,"src":"\/\/www.plentyofbikes.com\/cdn\/shop\/files\/w2z9pgjp6jqop6pub3w5.jpg?v=1763148557"}},"requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/www.plentyofbikes.com\/cdn\/shop\/files\/w2z9pgjp6jqop6pub3w5.jpg?v=1763148557"],"featured_image":"\/\/www.plentyofbikes.com\/cdn\/shop\/files\/w2z9pgjp6jqop6pub3w5.jpg?v=1763148557","options":["Size"],"media":[{"alt":null,"id":37170420973806,"position":1,"preview_image":{"aspect_ratio":1.0,"height":400,"width":400,"src":"\/\/www.plentyofbikes.com\/cdn\/shop\/files\/w2z9pgjp6jqop6pub3w5.jpg?v=1763148557"},"aspect_ratio":1.0,"height":400,"media_type":"image","src":"\/\/www.plentyofbikes.com\/cdn\/shop\/files\/w2z9pgjp6jqop6pub3w5.jpg?v=1763148557","width":400}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003eThe quality and performance-oriented Shimano BB-UN300 cartridge bearing bottom bracket features a JIS square taper mount and is designed for frames with BSA thread and 68 mm shell width. A stabilizer ensures a constant chain line.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBB type: Square Taper\u003c\/li\u003e\n\u003cli\u003eFits: JIS Square Taper\u003c\/li\u003e\n\u003cli\u003eQuantity: 1\u003c\/li\u003e\n\u003c\/ul\u003e"}
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Sold Out
Neco Cartridge Bottom Bracket - Square Tapered 68mm
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{"id":11882390671,"title":"Neco Cartridge Bottom Bracket - Square Tapered 68mm","handle":"neco-cartridge-bottom-bracket-square-tapered-68mm","description":"\u003cp\u003eNeco sealed cartridge bottom bracket.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBottom Bracket Type: Square Tapered\u003c\/li\u003e\n\u003cli\u003eDiameter: 68mm\u003c\/li\u003e\n\u003cli\u003eIncludes: Crankset Bolts\u003c\/li\u003e\n\u003c\/ul\u003e","published_at":"2021-11-10T15:57:43-08:00","created_at":"2017-08-20T15:07:04-07:00","vendor":"California Cycles","type":"Bottom Brackets","tags":["Brand_Neco","Parts"],"price":1599,"price_min":1599,"price_max":1599,"available":false,"price_varies":false,"compare_at_price":2499,"compare_at_price_min":2499,"compare_at_price_max":2499,"compare_at_price_varies":false,"variants":[{"id":48525234319,"title":"68x103.5mm","option1":"68x103.5mm","option2":null,"option3":null,"sku":"210000008716","requires_shipping":true,"taxable":true,"featured_image":{"id":29574482767,"product_id":11882390671,"position":2,"created_at":"2017-08-20T15:08:55-07:00","updated_at":"2020-05-29T14:18:38-07:00","alt":"Neco Cartridge Bottom Bracket - 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