Cannondale headset advice

Hello
I have just purchased a Cannondale bike frame SL 5 off eBay as my old Carrera frame was is on its last legs and has always felt to small for me, I have now found myself lost in a world of Headsets and out of my depth when it comes to finding the correct fitting model.
The Cannondale website is kind of vague on replacements and most of the threads I find relate to earlier models which i believe are the same but contain dead links. My Forks are 1.1/8 Suntour Epicons but the frame is 1.5 I believe?
To top things off I am on a tight budget also.
Any help would be much appreciated thanks
I have just purchased a Cannondale bike frame SL 5 off eBay as my old Carrera frame was is on its last legs and has always felt to small for me, I have now found myself lost in a world of Headsets and out of my depth when it comes to finding the correct fitting model.
The Cannondale website is kind of vague on replacements and most of the threads I find relate to earlier models which i believe are the same but contain dead links. My Forks are 1.1/8 Suntour Epicons but the frame is 1.5 I believe?
To top things off I am on a tight budget also.
Any help would be much appreciated thanks

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If the headset is 1.5" then that's the size cups you'll need, although make sure it is threadles and not integrated or something else
Unless you have a headset press I would advise getting a shop to fit the headset cups
Then you can buy a crown race that lets you run a 1 1/8 fork on a 1.5 headset
(Someone please correct me if I've made a mistake)
If the measurements are correct you will need a reducer headset, and I doubt it will be a cheap one.
First you need to be sure about the measurements, then work out what sort of headset, ie external, internal etc.
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get some reducers for it to 1 1/8 then fit a standard headset.
but before you spend any money will the fork steerer be long enough?
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