Headset for 34mm headtube - Kona Dew Plus

[Matthieuhaentjens]

Hello
I just got this Kona Dew Plus frame.
The internal diameter of the head tube is 34mm. I was wondering if anyone could help me pick the right headset for this frame ?

I thank you all in advance for your help!
Mateo

 

[figbat]

A bit of information here. It looks like it's a 1 1/8" headset you need - plenty of choices available for these.

 

[Ajax Bay]

34mm?? Very unusual (EDIT: ignore: @All uphill has explained)
1 1/8" = 28.6mm, just saying, (not saying you're wrong @figbat )

 

[All uphill]

34mm?? Very unusual.
1 1/8" = 28.6mm, just saying, (not saying you're wrong @figbat )

.
The 1 1/8" is the diameter of the steerer tube. The inner dimension of the headset is bigger, to accommodate bearings.

Sheldon Brown says an EC34 headset fits in a 34mm headset, and that 34mm is the most common mtb diameter.

Google Sheldon Brown for more info.

 

[Matthieuhaentjens]

Hello Everyone !
Thank you a lot for your answers.

When I type Headset 34mm on google this is the first one that appears:

https://www.chainreactioncycles.com...MIyLjEvsvo6QIVmKztCh3ghAOiEAQYASABEgIakfD_BwE

Do you think that would fit?

 

[rogerzilla]

Yes. Look at Cane Creek too. I've run a couple for a decade, one in daily use, and they never needed attention. In the unlikely event that you wear one out, the bearing cartridges are easy to get.

 

[Matthieuhaentjens]

Hello
Thank you again

I assume for this frame I would need a 1-1/8 threadless fork.

Do you think this would work ?

https://www.ebay.co.uk/itm/Bicycle-...724339?hash=item4b6e65faf3:g:FfEAAOSwBGRdxtye
I appreciate your help !
It helps me advance in this project without making mistakes !
Thanks again
Mateo

 

[cyberknight]

if you know the year of the model you can normally google it , i have found 2 different variants with different types

 

[Ajax Bay]

would need a 1-1/8 threadless fork.

Would have thought you'd have a fork for disc brakes (link is for rim brakes):

Brakes	Tektro HDC300, hydraulic disc

spec from: http://www.bikeroar.com/products/kona/dew-plus-2014/specs

 

[Matthieuhaentjens]

I have a pair of caliper rim brakes so I was thinking using this instead. I am not sure of the year . I am sure I have a 34-34mm headtube threadless though... any idea?

I thank you in advance
Mateo

 

[rogerzilla]

Now we know it's an EC34 headset, stack height is the only thing to be aware of if you change model but it's rarely an issue with threadless setups unless you've cut the fork right down so there are no spacers left. You can generally just add or remove spacers to suit.

On threaded forks, stack height can be a nightmare. Some 90s bikes had their steerer cut very short to suit a Shimano headset with very low stack height.

 

[Matthieuhaentjens]

Hello Thanks for your answer

When I measure the lenght of the frame headtube I have 15cm.

The fork tube is 18.5cm..is that enough ?
Cheers
Mateo

 

[Ajax Bay]

No. The steerer tube has to stick up above the combination of headtube plus headset stack depth. You need enough excess to clamp a stem onto it (maybe up to 50mm), and sensibly a thin (2.5mm) spacer above and below.
The Brand X headset you linked to earlier has a stack height of ~29mm.
So the steerer tube of the e-bay fork you linked to @ 185mm is no where near long enough.
Look for a steerer tube of minimum 150 +30 + 50 + 5 (mm).

 

[Matthieuhaentjens]

Understood. Thank you so much !
Mateo

 

[rogerzilla]

200mm is a really short steerer for a new fork. They're usually super-long so they can be made in one size and cut down by the installer.

Bear in mind that many new 1 1/8" steel forks will need the steerer tube's crown race seat cutting to an accurate 30.0mm diameter, with a perfectly flat and perpendicular base. This is not always done at the factory. Any decent bike shop will have the tool.