Bottom line I need a headset for a diamondback Haanjo
1.5 - 1-1/8 tapered fork.
Upper frame measures 42mm inner diameter
Lower frame measures 52mm inner diameter
It came with bearing cups pressed in and I tossed them.
the manual said it uses an FSA c40 headset (standard integrated type headset). So i took my old headset out and also push the bearing cups out as well. As the headset that came with the bike had bearing cups pressed into the frame then a separate race.
Now I was left with a just a frame and thought these bearing would fit. They don’t. They measure about .2mm to small and create lots of play.
I’ve called diamondback and FSA and neither can tell me what I need. Diamondback says their books say c40 but know it’s incorrect.
Bottom line I need a headset for a diamondback Haanjo
1.5 - 1-1/8 tapered fork.
Upper frame measures 42mm inner diameter
Lower frame measures 52mm inner diameter
It came with bearing cups pressed in and I tossed them.
the manual said it uses an FSA c40 headset (standard integrated type headset). So i took my old headset out and also push the bearing cups out as well. As the headset that came with the bike had bearing cups pressed into the frame then a separate race.
Now I was left with a just a frame and thought these bearing would fit. They don’t. They measure about .2mm to small and create lots of play.
I’ve called diamondback and FSA and neither can tell me what I need. Diamondback says their books say c40 but know it’s incorrect.
Any help is appreciated.
REI’s website (via Google) says FSA C-40. If it had cups pressed into the frame then perhaps those were necessary to adapt whatever they did on the frame to a more standard size. If it’s at all possible go back and find the parts that you tossed.
I had a similar thing with a Scott Spark. Integrated headset where the upper bearing and cup used a standard 42 mm cup and the lower used a standard 55mm cup. Except that 56mm is a lot more standard and 55mm is really hard to find. I ended up keeping the old cup pressed into the frame and just putting a new lower bearing in (which is the same size what the 56mm cup uses).
I wish I could but they are tossed for good. That bearing is .2mm from the right size and it needs cups as the upper frame is to shallow for a standard bearing.
I have been in touch with cane creek and those are the right size. However the upper frame is to shallow so the bearing sticks out half way and is not very secure. Maybe my only option at this point?
From the pictures he provided, it appears the integrated cups are still there.
This is an example of what I “think” I need but can’t find it.
42mm cup and ball on a retainer with a race at 1-1/8. This is what I tossed but can’t find but believe it was labeled FSA. I can’t find the part from them and also spoke with someone there.
The area is very shallow and the bearing will sit half out of the frame.
That should still work, though. In an integrated headset arrangement, the bearings are actually centered and located by the taper, not by the parallel walls. You might be able to find a top cap that extends downward slightly, over the exposed part of the bearing race. Looking through FSA’s website they have a couple of upper bearings that are similar to your previous arrangement but not with the 42mm diameter - they’re all 44 except for one that is 41.4.
Fwiw, IS52 lower bearings can be either 51.8 or 52 mm. FSA make the 51.8 and just about everyone else (cane creek, enduro) do 52 mm. I have no idea why the difference. You can usually loose fit the fsa into a 52 mm and it will be ok under preload as the taper holds it in place but you can’t fit a cane creek into a 51.8 mm head tube.
Also, forks with molded/integrated crown race are the work of the devil. Often they will only fit on the frame they were designed for or they will impact the head tube. Conical spacers aren’t available so you will have to draw up a design and get it machined to overcome this.
It’s worth noting that the 51.8 bearings are 36/45 degrees and the 52 mm bearings are 45/45. Very easy to get crown race angles mixed. I don’t have an easy way of telling them apart.
