You ignore those and measure the Pad reach (centre for Slowman, rear for other fit protocols) and stack

Is that called Cup stack and cup reach then?

I was going by this .......

No.

That diagram shows frame stack and reach.

Go by this


That shows pad centre, measure to rear as well

Maybe I'm not asking the right question, or missing something.

I'm trying to determine what size frame I need... I'll move my current cockpit to the new frame.

QR lists their sizes below. They don't list 'pad' measurements so I can't compare that measurement to my current bike?


Size485052545658.5Seat Tube Length48cm50cm52cm54cm56cm58.5cmTop Tube Length47cm49cm51cm53cm54.5cm56cmHead Tube Length7.4cm9.5cm11.5cm14.2cm15.8cm18.4cmHead Tube Angle71cm72cm72cm72cm72cm72cmSeat Tube Angle77 / 83˚77 / 83˚77 / 83˚77 / 83˚77 / 83˚77 / 83˚Chainstay Length39.5cm39.5cm39.5cm39.5cm39.5cm39.5cmWheelbase95.7cm96.8cm99.5cm101.7cm103.1cm105cmStandover Height73cm75cm77cm79cm81.5cm84cmFront Center57.4cm58.4cm61cm63.3cm64.7cm66.5cmBB Drop7.35cm7.35cm7.35cm7.35cm7.35cm7.35cmFork Rake4.8cm4.8cm4.8cm4.8cm4.8cm4.8cmStack48cm50cm52cm54cm56cm58.5cmReach38cm39cm41cm42.5cm43.5cm44.5cm

Compare your frame's stack and reach to the new frame's stack and reach.

Then see if you can manipulate your aero bar system on the new frame to see if you can get to your current pad position.

Or I'm not explaining it very well.

Just comparing frame size introduces errors around headsets (your Yaqui likely external), spacers and head tube angle.
Pad XY (reach/stack) gets right to the point and then we can fill in the dots.
Post your Pad XY (to the rear in my system) and I'll show you.

you're making the assumption that you're on the right size frame currently with the right stem and aerobar cockpit configuration... you just want to swap. The good fitters on this forum won't grant you that assumption and want to know what's *really* important, your pad stack and reach as measured from the center of the bottom bracket.

Once you give us those numbers we can determine the correct size PR5 and with what front end configuration.

A picture of your fit would help. Show us your massive amount of spacers under the stem ;)

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Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting

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