Manufacturer Fork Steerer Tube Spacer Recommendations
I'm looking to install a 1" Nashbar/Winwood carbon fork with an aluminum steerer, which comes with the same manufacturer's recommendation of no more than 25mm of spacers regardless of whether to steerer is 1" or 1-1/8" and regardless of whether the steerer is carbon, aluminum or steel.
First, I realise that the Nashbar/Winwood fork is not a higher end component, but I find it odd (and perhaps overly conservative) that the spacer limit is documented as the same for a 1" carbon steerer as it is for a 1" steel or 1-1/8" aluminum steerer.
Regardless, let's say that I adhere to the 25mm limit - if I place the 25mm of spacers under the stem (which i'm fine with as far as the resulting handlebar height goes, but I wouldn't want to go any lower), can I still run a 5mm or 10mm spacer above the stem to give some latitude in case I ever need to install a stem with a taller clamp height than the one I have now? Or would this pose a safety hazard?