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Anyone with a mega know whether I could run a 1 1/8 steerer cut to 170mm with an external bottom cup?
I'm looking at a frame but have a set of 36s ready to go on it but need to know its not too short in the steerer tube, I wont be running many spacers anyway considering the A2C .
Many thanks in anticipation for your help
Matt
Headtube is quoted as 115mm
External cup is +15mm
So that would leave you approx 40mm steerer, so depends on the clamp height of the stem and overall stack height of the headset.
A Renthal stem is one of the lower stack stems, at 40mm.
Personally I prefer the steerer to go all the way through the stem with a spacer above.
I'll try to remember to measure my overall steerer tonight but it sounds close.
Cheers for that !
Should be able to run an internal headset if your steerer is 1 1/8, so should have loads of steerer.
building upa NP mega at the moment. Also have Fox 36s with a 1 1/8th steerer length of 170mm. I've got a Hope headset 2H (ext bottom cup)which is about 25mm stack height. I found that with 40 mm Thomson stem the steerer is about 5mm too short, with the hope top compression ring added. As long as I don't use the compression cap its ok, but the steerer does not completely go to the top of the stem. Using a int bottom cup headset will be ok though, or maybe a stem with a 35mm stack height would be ok.
Yep - a 44mm internal headset, spot on. The Hope 2 upper and B lower, for example.
Recommended Fork length - 160-180mm travel with Internal bottom cup 44IISS, 150-170mm with External bottom cup 44IETS, 44IESS or 44EE0S
http://www.chainreactioncycles.com/Models.aspx?ModelID=70725
http://www.chainreactioncycles.com/Models.aspx?ModelID=70727
Just measured mine, which has an external Hope lower and internal Hope upper headset....you will only be left with 30-32mm steerer showing. Not what I would feel safe with. If your 36's have 1 1/8" steerer, try an integral lower headset. I run my Mega with 150 Rev's which I prefer over 160 Deville's for the type of trail centre riding I do 8)
Hope internal bottom cup
Nukeproof internal top cup
5mm spacer
40mm stack height stem
Total - 174mm crown to stem top
So 169mm with no spacer and internal cup.