These adapters are special, and only the freaks of you will notice that. The PMPM+20/23mm adapter has 4 bolts, but looks tiny just like one with 2 bolts. The difference is: the normal 2 bolt adapter needs to have spherical heads and washers, which are able to compensate the small angle difference between fork and caliper. With the Extension Brakeadapter you have a solid 4 bolt mounting of your caliper, with a clean looking appearance.
And the second point is, you can mount it as a +20/40 or +23/43mm. Without extra parts.
|Product Name:||Intend Blackline Extension Disc Brake Adapter - Postmount to Postmount - +40/43 mm|
|adapter (mount to brake):||PM to PM|
|Disc brake - spare parts & accessories:||Disc Adapter|