There's currently two 2cm spacers under there (Time branded and came with the frameset), the clamping area of the Zipp stem is shorter than the OG one so I had to pop another 0.5cm under there so there wasn't a bit of steerer tube poking out of the top. Now everything is OK reach wise it does actually feel a bit 'sit up and beg' and from a quick mile round the local roads I might be able to go lower in the drops so I will experiment with maybe just leaving 20-25mm under and cut the steerer to match if the geometry works on a longer ride.
There's currently two 2cm spacers under there (Time branded and came with the frameset), the clamping area of the Zipp stem is shorter than the OG one so I had to pop another 0.5cm under there so there wasn't a bit of steerer tube poking out of the top. Now everything is OK reach wise it does actually feel a bit 'sit up and beg' and from a quick mile round the local roads I might be able to go lower in the drops so I will experiment with maybe just leaving 20-25mm under and cut the steerer to match if the geometry works on a longer ride.