{"product_id":"madera-helm-spline-drive-sprocket","title":"Madera Helm Spline Drive Sprocket","description":"\u003cp\u003eThe Madera Helm is a spline drive sprocket machined from 7075 aluminium in the USA. Instead of a sprocket bolt it uses a hardened chromoly steel insert that matches the 48 splines on the bottom bracket axle, so drive goes straight from the spindle to the sprocket.\u003c\/p\u003e\u003cp\u003eIt is made for 19mm 48 splined Profile spindles and is supplied with the splined steel insert. Sizes are 25t and 28t with 1\/8\" tooth width, and the 25t weighs 81g. Spline drive sprockets are not compatible with right side drive two piece cranks because there is not enough room for the splines, though they do work on left side drive two piece cranks.\u003c\/p\u003e","brand":"Elite Cycle Imports","offers":[{"title":"Cloud Grey \/ 28T \/ 19mm 48 Spline","offer_id":48288462930071,"sku":"osn1789732479935","price":33.92,"currency_code":"USD","in_stock":true},{"title":"Black \/ 28T \/ 22mm 48 Spline","offer_id":48288462962839,"sku":"ifv1789732479936","price":60.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1908\/8279\/files\/madera-helm-spline-drive-sprocket_1.webp?v=1789732484","url":"https:\/\/winterhearthsidestyle.shop\/products\/madera-helm-spline-drive-sprocket","provider":"My Store","version":"1.0","type":"link"}