{"product_id":"cog-custom","title":"Bike Custom (Gear Ratio Change)","description":"\u003cp\u003e\u003cem\u003eーCustomization of complete bikes is available for customers in Japan onlyー\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThis customization option is available only when purchased together with a complete bike. Your bike will be delivered with the customization already installed. The listed price includes both the parts and installation labor.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eThe Quickest Way to Change Your Gear Ratio: Swap the Cog\u003c\/h2\u003e\n\u003cp\u003eThe ideal gear ratio depends on how you want to ride.\u003c\/p\u003e\n\u003cp\u003eSome people want to go fast. Some want to cruise around without turning every ride into leg day. Others want a setup that is easier to use for trick practice.\u003c\/p\u003e\n\u003cp\u003eNot sure which gear ratio is right for you? Staying with the original 17T cog is perfectly fine. There is no shame in letting the factory make one decision for you.\u003c\/p\u003e\n\u003ch2\u003eGreat Value, Better Quality: grunge Cog\u003c\/h2\u003e\n\u003cp\u003eThe original 17T cog supplied with the complete bike is made from steel, but it is a very basic and inexpensive component.\u003c\/p\u003e\n\u003cp\u003eThe grunge cog is also made from steel, but features weight-saving cutouts and a much cleaner finish. It also comes with a lockring.\u003c\/p\u003e\n\u003cp\u003eSo while we are changing the cog, you may as well give both the cog and lockring a small but satisfying upgrade.\u003c\/p\u003e\n\u003ch2\u003eCog Sizes, Gear Ratios, and Skid Points\u003c\/h2\u003e\n\u003ch3\u003eFor Riders Who Want More Speed: 15T\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eRizer\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e46T chainring ÷ 15T cog\u003cbr\u003eGear ratio: \u003cstrong\u003e3.07\u003c\/strong\u003e\u003cbr\u003eSkid points: \u003cstrong\u003e15\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMelancholy \/ Jealousy\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e48T chainring ÷ 15T cog\u003cbr\u003eGear ratio: \u003cstrong\u003e3.20\u003c\/strong\u003e\u003cbr\u003eSkid points: \u003cstrong\u003e5\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eFor Relaxed Riding or Trick Practice: 19T\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eRizer\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e46T chainring ÷ 19T cog\u003cbr\u003eGear ratio: \u003cstrong\u003e2.42\u003c\/strong\u003e\u003cbr\u003eSkid points: \u003cstrong\u003e19\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMelancholy \/ Jealousy\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e48T chainring ÷ 19T cog\u003cbr\u003eGear ratio: \u003cstrong\u003e2.53\u003c\/strong\u003e\u003cbr\u003eSkid points: \u003cstrong\u003e19\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003ePlanning to Skid? We Recommend 10 or More Skid Points\u003c\/h2\u003e\n\u003cp\u003eWhen you skid, the tire rubs against the road and gradually wears away.\u003c\/p\u003e\n\u003cp\u003e“Skid points” refers to the number of different positions on the tire that can make contact with the ground during a skid.\u003c\/p\u003e\n\u003cp\u003eIf your setup has only one skid point, the same section of the tire gets punished every single time. Eventually, the tire may decide it has had enough and reward you with a puncture.\u003c\/p\u003e\n\u003cp\u003eFor riders who skid regularly, we recommend a setup with at least 10 skid points.\u003c\/p\u003e\n\u003cp\u003eEven with fewer skid points, you can spread the wear by periodically repositioning the chain on the rear cog. This changes which part of the tire contacts the ground during a skid and helps reduce concentrated wear.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/6992\/5093\/files\/7750468a1e56790c20a88ddbd8cd84c6_e41081f0-ccd7-4285-a7f0-e90a2b993d01.jpg?v=1737074644\" alt=\"\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/p\u003e\n\u003ch2\u003eAlready Have a Favorite Cog? That Works Too.\u003c\/h2\u003e\n\u003cp\u003eWe can also install cogs from other manufacturers, including Euro-Asia, if you send the cog to Masterpista.\u003c\/p\u003e\n\u003cp\u003eSome unusual cogs that are not compatible with a standard lockring may be difficult to install, so please contact us before sending anything.\u003c\/p\u003e\n\u003cp\u003eCog sizes from 15T to 19T can generally be used with the original chain. For larger cogs, the original chain may be too short, and you may need to purchase an additional chain.\u003c\/p\u003e\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eThe removed original parts will be included and shipped with your bike.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eChanging the cog size changes the rear wheel position, which can affect brake pad alignment and tire clearance. We may therefore cut and adjust the chain to achieve the correct setup.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Masterpista","offers":[{"title":"15T","offer_id":50326823928037,"sku":null,"price":5950.0,"currency_code":"JPY","in_stock":true},{"title":"16T","offer_id":50326823960805,"sku":null,"price":5950.0,"currency_code":"JPY","in_stock":true},{"title":"18T","offer_id":50326823993573,"sku":null,"price":5950.0,"currency_code":"JPY","in_stock":true},{"title":"19T","offer_id":50326824026341,"sku":null,"price":5950.0,"currency_code":"JPY","in_stock":true},{"title":"その他（支給のパーツに交換）","offer_id":50326829924581,"sku":null,"price":1000.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0648\/6992\/5093\/files\/custom-cog2.jpg?v=1784344444","url":"https:\/\/master-pista.com\/en\/products\/cog-custom","provider":"Masterpista","version":"1.0","type":"link"}