Decathlon B-Twin brand : 1st place I look for bike components

Decathlon (UK) is a shop I now look at first for bike components. The usual choices for brake and drivetrain components etc are Shimano and Sram and seem to have a decades long duopoly.

Recently I noticed Decathlon have bike components using their B-Twin branding. I trust this shop and they have a casual returns policy, and they also tend to offer quality products as their own brand at much cheaper prices than alternatives.

So currently they are my first point of reference when looking for anything to do with cycling including clothes

There are only a few stores in the UK. They have the same type of store presence as IKEA.

Decathlon UK Cycling dept

Items I have bought

7/8 speed 11-34 tooth rear derailleur : £7.99
to replace Shimano

V-brake pads 

Rear Derailleur High Low Limit screws : which way to turn ? and indexing tension

H Hi High

 smallest

 hardest

 gear (furthest from wheel)

L Lo Low 

biggest

easiest

 gear (nearest the wheel)

H screw (furthest from wheel)

clockwise : moves the derailleur IN towards the wheel

anti clockwise : moves the derailleur OUT

L screw (nearest wheel)

clockwise : moves the derailleur OUT

anti clockwise : moves the derailleur IN

H - clock - in

H - anti - out

L clock - out

L - anti - in