I want to put disc brakes on my bike but I do not know which type to put on
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1What kind of fork do you have?– Vladimir F Героям славаMay 11, 2020 at 18:37
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2Can you edit in a photo?– SwiftyMay 11, 2020 at 18:37
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1I edited it but it added more photos than I thought it would– FerretboiMay 11, 2020 at 19:53
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1@Ferretboi I deleted the duplicate photos– SwiftyMay 11, 2020 at 20:08
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1 Answer
In order to fit a disc brake, you need a compatible fork and a compatible wheel, plus a compatible brake lever.
Your fork does have a disc brake mounting already designed in, it is an International Standard (I.S.) mount. Most mtb brakes now are Post Mount fittings so are fitted using a simple adapter. You can see the differences here or search around images.
To fit a disc brake you need a disc compatible wheel of the correct diameter (check the current size), the caliper and maybe a lever. If you have V-brakes now, you could add a mtb specific, cable-operated caliper to the existing lever with a new cable and housing. Alternatively you can get pre-bled hydraulic disc brakes, comprising the lever, caliper and disc, ready to use out of the box. N.B. there are two standards of disc mounting, 'six-bolt' and 'centre lock', match this to the new wheel hub.
Bear in mind that because you need a wheel change, changing to a disc brake could be expensive relative to the value of the bike (which is of course not always monetary). It's up to you to decide the best use of the money; that might mean upgrading this bike, or it might mean saving up towards a disc brake specific bike, new or used.
An interim upgrade could be a high quality brake of the same type you have; if it is a V-brake, good models are quite affordable and do make a noticeable difference over basic models. Also, with rim brakes particularly, high quality brake pads noticeably increase performance for not a lot of money.
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515-20 years is too much. My 2010 Merida Matts has those on the fork and on the frame. They were selling both the -V and -D version. It was not expensive, but no BSO. It is Deore, the RD is Deore XT. May 11, 2020 at 21:01
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@VladimirF I think around 2010 it was fairly common for bikes to come in disk- and V-brake versions. My GT hybrid from around then has V-brakes but the frame could take disc brakes. They shipped a different fork on the disc version– Chris HMay 12, 2020 at 14:00
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1@WeiwenNg I'd say what really counts for V-brakes is the stiffness in the caliper arms, they can vary greatly. The cable run is generally very short, so not that consequential. I wouldn't prioritise compressionless housing here or use it to make up for a bad brake. Cable discs however normally have a full run of housing, front is double the length of a v-brake housing and rear is like twice as long again, hence the benefit of compressionless housing.– SwiftyMay 12, 2020 at 14:49