Bike Disc Brake Adapter 203mm, Spares Adapter for Front, Brake Mounting Bracket, is Standard Brake Caliper Adapter for MTB BMX Road Bike Cycling(F203 Black)

I was a bit unsure after reading the description and some reviews, but can confirm that this is the correct size to convert a 160mm fork post mount to allow the fitting of a 203mm rotor.

Wanted the option to go to a 203mm rotor. This adapter fitted the bill. And a good price.

Works great at moving my calliper to fit a 203mm disc.

Contry to other reviews for this item this isn't the right adapter to go from 160mm native (the original size disk the fork was made for) to 203mm. For this to work it would need to be +43/40mm and it certainly isn't that wide, +20mm at most. So the quest continues, possibly easier to find the holy grail, loch Ness monster and alien life combiined than it is to find the right adapter to up- size your rotors! Also the machining on the internal threads is a bit dodge as the Shimano M8's off the existing caliper 'bit' a little on tightening...

Perfect

Well, these weren't even close to the right thickness to align my calipers with the rotors. They positioned the caliper too far above/past the rotor so that only about 1/8" of the pads were touching the very outside edge of the rotor. I double checked the diameter of my rotors and they were 203mm so they weren't the problem. My bike came with 160mm so these brackets should've worked. I wound up heavily modifying these (cut the thickness way down) to get them to work. I probably could've went with 220mm rotors using these brackets.

past perfekt gerne wider

Tenía una horquilla de base 160mm con adaptador para disco de 180mm con disco de 180,y quería poner una mayor,de 203,he quitado el adaptador que tenía y solo con esta he pasado de 160 a 203mm y ha quedado muy bién,...por cierto mi horquilla es una rock shox xc30

Tutto perfetto

Lieferung super schnell, Der Adapter passt zu 100% bei meinen Riese&Müller Delite, aber aufgepasst habe erst den falschen Adapter nämlich 180 auf 203mm, das war ein Irrglaube es muß ein 160 auf 203mm sein da meine Bremse schon ein Adapter von 160 auf 180 hatte. Original Magura lautet die Bezeichnung PM6 203 (QM42) der aber das doppelte kostet. Was mir besonders gefällt das der Adapter perfekt passt. Die Bremsklötze sitzen passgenau auf der Scheibe, sie sitzen nicht zu tief auf der Scheibe und ragen auch nicht über die Bremsscheibe, sondern genau bündig mit der Scheibe, kann nur empfehlen wer solche Größe sucht. Ansonsten were es zu empfehlen im Handbuch der jeweiligen Bremse nach zu lesen.