genesis fortitude adv fork clearance

[Dr Nick]

Anyone know what size tyre (and on what width rim) will comfortably fit into standard Genesis fortitude adventure forks?
just wondering how fat/ plus I can go without having to change the forks..
cheers
Nick

[jameso]

I'm not home for a day or so to say for sure but pretty sure a 2.4 on 35mm rim fits the fork I have in the garage. The 2.8 panaracers should fit?

[Pickers]

Hi Nick, what's the clear space between the fork legs? We know that a 2.4" will fit ok (edit after post above - my 2.4 fitted neatly when tried at the WRT). My Ogre is around 95mm clear and I've seen a 3" tyre in with a little room to spare (not sure on rim width though). Wouldn't like it with the sticky mud around here though - things would grind to a halt pretty quickly.

Slight hijack - would the 2.4 be better suited to a wider rim than the 19mm ones on there now?

[Dr Nick]

thanks both. I'll check the measurement when home this evening.

When funds allow I plan to build up a dyno hub'd front wheel probably with a Velocity blunt 35mm rim, and build the Alfine rear hub into a matching rim...

mud clearance is in the back on my mind too...

alternative forks are of course an option, but then the costs start to mount up...

[darbeze]

I run Conti X-King 2.4 on the original rims both ends on my Fortitude with plenty of clearance...

Wider rims will probably make the tyre fill out a bit.

I did "shoehorn" a rear wheel and tyre from a 2016 Longitude in the other day at my friendly LBS. Amazingly it fitted and I could even turn the cranks in the work stand. However, the clearance was so minimal that it would never work in the real world; i.e. riding it!

According to Genesis bikes, the Longitude uses 650b 38mm rims and 2.8" tyres....

Si

[jameso]

Just looked up the fork drawing .. the amount of stuff I have filed on this laptop. 80mm clearance at a point 45mm below the underside of the crown. Axle to underside of crown is 406mm.

[rufus748]

A mate has a fortitude, he's running velocity blunts with a 3" chronicle without any problems. He's also squeezed a 3" in the rear with a small amount of cold pressing the stays (albeit the rear comes in around 2.8").

[Dr Nick]

Thanks all.

@jameso: that's very useful.
@rufus748 does your mate ride through gloopy mud ok with no clogging problems?

Cheers,
Nick

[rufus748]

Thanks all.

@jameso: that's very useful.
@rufus748 does your mate ride through gloopy mud ok with no clogging problems?

Cheers,
Nick

On the front, yes no problems. Space on the rear is somewhat 'at a premium'. No issues recently on the WRT however on a local ride that was more like clay it seized up. However, so did my Rooster and 99% of the other the riders taking part.

[BenS]

I have a Fortitude Adventure, rebuilt the wheels with 35mm rims and run a conti X king 2.4 at the back and a Panaracer 3.0 fat be nimble at the front (which is actually a 2.8). I can measure clearances tonight if it's useful.

[Dr Nick]

@BenS

Yes please! That'd be great.

Cheers
Nick

[BenS]

On the front there is ~8mm each side, on the rear 10mm.

I get the 2.4 tyre on the 35mm run at 58mm and the 2.8 at 73mm

[Dr Nick]

That's great. Thanks very much indeed...

[BenS]

Meant to say, I'm very pleased running the bigger tyres on it. It makes me smile!

[notinabox]

Meant to say, I'm very pleased running the bigger tyres on it. It makes me smile!

Looking at doing this very thread. Thank you all