When is Tapered not Tapered?

jimo746 · Aug 27, 2014

I have a 2013 Ghost ASX4900 frame, which from what I've read has a tapered head tube, and tapered forks.
However upon taking things apart today it seems that the forks (Suntour Raidon Air EL) are not tapered at all, but a straight 1" 1/8th steerer, and upon trying to fit the new forks (with tapered steerer) it's obvious that the lower race and headset cup is designed for 1"1/8th steerer.

But the bearings look like 1.5" diameter :?

What's going on?

Does this mean the headtube is in fact 1.5" but is fitted with a reduced headset to suit 1"1/8th steerer??

Is it just the crown race and lower cup I need to source in 1.5" size? or is it a case of buying an entire new headset??

help!!

elPedro666 · Aug 27, 2014

It'll likely be 44mm rather than 1.5", with any luck all you need is a new crown race...

dyna-ti · Aug 27, 2014

If theres an obvious difference between the diameters top and bottom of the headtube then its the taper. Far as i know you can fit a 1.5" OD-1 1/8" ID headset to them for standard forks, so it would indeed be a tapered headset specific for a tapered frame.
If in doubt you could always drop them an email. Arrives instantly and youll still have 2 days before the weekend to get and answer

superstu · Aug 27, 2014

My understanding is you'll have a different 'bottom' part if the headset to get either taper or non taper forks to fit your tapered head tube.

I have been looking at the following frame and they explain quite clearly the different headsets...I know not directly relevant to your frame but helps explain it hopefully

http://www.ragleybikes.com/bigwig-29er- ... l#overview

Ps it used to be so easy!!

elPedro666 · Aug 27, 2014

Usually it's just the crown race that acts as reducer, the bottom cup should stay the same ... with a little luck!

jimo746 · Aug 27, 2014

Re:

This is my first time dealing with this modern tapered headtube devilry :evil: , here's a pic of the lower headset cup (it's a Ritchey headset)... I'll get the vernier calipers out and see what's what, but I'm thinking it's a case of new lower cup/crown race/bearings Hope Pic n' Mix?), or maybe easier to just get a tapered headset :|

Looks like an "integrated" lower headset cup? reducer (1.5" to 1"1/8th) style?

elPedro666 · Aug 27, 2014

Still betting on a 44mm and you just need a new crown race

jimo746 · Aug 27, 2014

elPedro666":1xrizlpw said:
Still betting on a 44mm and you just need a new crown race

yup

I measured 43.76mm inside diameter of the lower headtube (once I had knocked out the lower headset cup).

However, I'm going to need a lower headset cup as the one that was in there was obviously stepped or reduced to fit in the 1"1/8th bearings.
I did try the "new" tapered steerer forks and it's clear that there's no way they will fit with that bottom headset cup.

sooo... 1.5" Bottom headset cup, bearings, and crown race are needed. Any suggestions? I'm planning on changing frame later this year, so either a cheap and cheerful stop-gap, or something decent that I can transfer onto another frame a few months down the line.

elPedro666 · Aug 28, 2014

Re:

viewtopic.php?f=39&t=304614&view=unread#unread

Might do it!

Annoying that you need a full swap though, I think that most keep the same lower cup and the reduction is on the crown race

I think 44mm and 1.5" are different *standards* too...

jimo746 · Aug 28, 2014

Re:

Think I'll go for a cheap tapered headset, something like the £20 AEST ones on eBay, as I'm changing frames in a few months anyway, and there's no guarantee the new frame will be compatible with the headset.

So, semi integrated, or integrated?

When is Tapered not Tapered?

jimo746

elPedro666

dyna-ti

superstu

elPedro666

jimo746

elPedro666

jimo746

elPedro666

jimo746

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