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74mm front axle and disc brakes?

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74mm front axle and disc brakes?

Old 11-23-22, 04:29 AM
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h3rtz
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74mm front axle and disc brakes?

Hi,

does anyone know a complete folding bike that comes with 74mm (or up to 86mm) front axle and disc brake? Or a 20" fork / 74mm disc hub combo?

I've seen plenty of 74mm disc hubs for sale but not a single instance of a bike fitted with one. I wonder if it even can be done?

Greets, Tim
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Old 11-23-22, 05:28 AM
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Originally Posted by h3rtz View Post
Hi,

does anyone know a complete folding bike that comes with 74mm (or up to 86mm) front axle and disc brake? Or a 20" fork / 74mm disc hub combo?

I've seen plenty of 74mm disc hubs for sale but not a single instance of a bike fitted with one.
..my FSIR Spin 5.1 has
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Old 11-23-22, 05:10 PM
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Originally Posted by h3rtz View Post
does anyone know a complete folding bike that comes with 74mm (or up to 86mm) front axle and disc brake? Or a 20" fork / 74mm disc hub combo? I've seen plenty of 74mm disc hubs for sale but not a single instance of a bike fitted with one. I wonder if it even can be done?
At least some of Dahon's use 74mm front hubs, so there might be one that also uses disk brakes, but only experts of the brand would know.

https://www.google.com/search?q=daho...brake&tbm=isch
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Old 11-23-22, 08:23 PM
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Originally Posted by splithub View Post
..my FSIR Spin 5.1 has
A photo would not be out of place, inappropriate or unappreciated here.
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Old 11-24-22, 03:45 AM
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Originally Posted by splithub View Post
..my FSIR Spin 5.1 has
pic od it didn't happen

...or do you happen to know of a web page that shows those bikes with specs? a quick google search didn't bring up anything useful...
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Old 11-24-22, 04:50 AM
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Originally Posted by h3rtz View Post
pic od it didn't happen

...or do you happen to know of a web page that shows those bikes with specs? a quick google search didn't bring up anything useful...
The fantastic FSIR folders are no longer being made or sold. A few of us, though, managed to snag a specimen or two before they expired. 😉
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Old 11-24-22, 06:09 AM
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Originally Posted by h3rtz View Post
pic od it didn't happen

...or do you happen to know of a web page that shows those bikes with specs? a quick google search didn't bring up anything useful...






...sorry, had to pull it out from hibernation. Bike looks disfigured - has 47-305 tires on it for ergonomic tests - standard is 406. Hub in pic i made myself from 100mm hub, because i bought the bike and built the wheelsets i wanted long before 74mm disc hubs were widely available.
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Old 11-24-22, 04:09 PM
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That Hutchinson tire says 47-305 on the sidewall but looks a lot more plump than that. Is it the camera distorting its size?
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Old 11-25-22, 05:21 AM
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Originally Posted by Ron Damon View Post
That Hutchinson tire says 47-305 on the sidewall but looks a lot more plump than that. Is it the camera distorting its size?
..it's the rims stretching the tires out to 60mm. Was looking for a lightweight voluminous slick but didn't find (in 305), tried to make my own by shaving knobby veetire crown gem in 2.25 and a chaoyang sparrow in 2.6 but they both came out too sticky of the material - too much rolling resistance. So i found these 40mm rims in the parts range of a bike trailer manufacturer. They fit the bill making comfortable volume and being lightweight, cheap and of acceptable quality and stability so far.
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Old 11-25-22, 07:03 AM
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Originally Posted by splithub View Post
..it's the rims stretching the tires out to 60mm. Was looking for a lightweight voluminous slick but didn't find (in 305), tried to make my own by shaving knobby veetire crown gem in 2.25 and a chaoyang sparrow in 2.6 but they both came out too sticky of the material - too much rolling resistance. So i found these 40mm rims in the parts range of a bike trailer manufacturer. They fit the bill making comfortable volume and being lightweight, cheap and of acceptable quality and stability so far.
You're a real McGyver, ain't Cha?
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Old 11-25-22, 10:59 AM
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Originally Posted by Ron Damon View Post
You're a real McGyver, ain't Cha?
It's playing, only 10% of the things i try actually work
To get back on track, there is no real problems with 74mm hubs and disc brakes since the spoke flange distance can be smaller on smaller wheels. If 50mm is enough for 622 wheels, 35mm is fine for 406. It makes the fold narrower. I would plead for a narrower standard in the back also. The only limitation i ever heard of is that the TRP double actuated mechanical brakes don't fit, i have Tektro Lyra on it.

Last edited by splithub; 11-25-22 at 11:03 AM. Reason: picture
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Old 11-29-22, 10:56 PM
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splithub , thanks a ton mate. That is really helpful!
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Old 11-30-22, 04:53 PM
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I remember seeing a website that was selling replacement front forks for Dahon bikes that could fit 100mm hubs with disc brakes. They were selling also on ebay.

Here it is on ebay:
https://www.ebay.co.uk/itm/134225217381

you'll need to check if it has the threads for the type of headset nut that Dahon uses. It looks like this uses a star nut / expander with a compression ring. Hopefully it may fit.
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Old 11-30-22, 04:58 PM
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Also, I thought the steerer tube length was longer on Tern compared to Dahon, so I'm not sure how this fork they're selling is supposed to be compatible with both.
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Old 11-30-22, 05:16 PM
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Originally Posted by Winfried View Post
At least some of Dahon's use 74mm front hubs, so there might be one that also uses disk brakes...
AFAIK all Dahon with disk brakes use a 100mm OLD front hub: the Launch, K3 Plus, the new 2023 model Curl.
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Old 12-01-22, 06:59 AM
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It seems strange to me that the Dahon EU website lists both the Launch D8 and K3 Plus, but I haven't found them for sale in EU stores.
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Old 12-20-22, 12:03 PM
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Originally Posted by splithub View Post
What are those rims on the folded bicycle with the white frame and Big Apple tires?
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Old 12-21-22, 12:01 AM
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Originally Posted by Nyah View Post
What are those rims on the folded bicycle with the white frame and Big Apple tires?
They are stock, generic double wall, 305x18c
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Old 12-30-22, 09:54 PM
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Originally Posted by tcs View Post
AFAIK all Dahon with disk brakes use a 100mm OLD front hub: the Launch, K3 Plus, the new 2023 model Curl.
And the Hemingway/K-ONE.
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Old 12-31-22, 03:00 PM
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Originally Posted by splithub View Post
They are stock, generic double wall, 305x18c
Does 18c mean 18mm internal width?
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Old 01-03-23, 08:46 AM
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Originally Posted by Nyah View Post
Does 18c mean 18mm internal width?
Yes it does..
Happy new year!
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