The frame needs a 12mm TA with a thread of 1mm (article code QRET124ZA046)

The 525R uses the SRAM Universal Derailleur Hanger (UDH). This means you will find easily a replacement hanger wherever you are as it is a standardised hanger (article code HANUDHSRA001)

The tire cleance of the 525R is 35mm, actual width. This means the actual width of the tire on the rim. This can be different from the size mentionned on the tire.

The maximum torque to fix the seatpost clamp is 4Nm, like mentionned on the clamp

We use a BB86 press-fit bottom bracket standard on the 525R.

The integrated seatpost clamp (Ridley article code SPCAER4ZA012) is designed for the aero seatpost of the 525R.

The 525R is design around an integrated cockpit to have most aero setup, but you can use a traditionnal stem and handlebar. You will need a transition spacer SPAAER4ZA012 to use round spacers and a traditionnal stem.

The 525R has a steeper seattube angle of 75° in size M, compared to 73° on the previous generation 525. The seattube angle is also steeper going from small sizes to  larger sizes so also taller riders can benefit from this central position. This steeper seattube angle follows the latest trend we see in profesionnal cycling where riders want to ride in a more forward position on the bike, closer to the bottom bracket. This position allows the rider to push in a more efficient way on the pedals by a more open hip angle. From a geometry perspective, we have kept the actual top tube length the same, compared to the previous Noah so the distance between the saddle and cockpit remains the same.