Challenge suspension explain?

DIscuss anything relating to non-standard cycles and their equipment.
speedy7777
Posts: 11
Joined: 24 Sep 2017, 11:20pm

Challenge suspension explain?

Postby speedy7777 » 26 Feb 2019, 5:57pm

Could someone who knows describe the design of the rear suspension of Challenge bikes like the Furai, Fujin or Sieran, please.
Ive been looking for ages and cant tell if the frame has a pivot built in to it or if its only the seat which has a pivot and is suspended and the main frame is one piece. I hope thats clear.
$_86.JPG

UpWrong
Posts: 789
Joined: 31 May 2009, 12:16pm
Location: Portsmouth, Hampshire

Re: Challenge suspension explain?

Postby UpWrong » 26 Feb 2019, 6:24pm

Yes, the swing-arm pivots and compresses the shock against the seat. There's an animated gif of it on the challenge bikes web site, but it's not responding at the moment.

User avatar
Cunobelin
Posts: 9189
Joined: 6 Feb 2007, 7:22pm

Re: Challenge suspension explain?

Postby Cunobelin » 26 Feb 2019, 6:36pm

I have the first Hurricane imported into the UK... It is an elastomer suspension

speedy7777
Posts: 11
Joined: 24 Sep 2017, 11:20pm

Re: Challenge suspension explain?

Postby speedy7777 » 26 Feb 2019, 6:54pm

Ok thanks upwrong that makes sense.

hercule
Posts: 940
Joined: 5 Feb 2011, 5:18pm

Re: Challenge suspension explain?

Postby hercule » 26 Feb 2019, 10:16pm

I've never ridden (or seen) one, but that suspension shock seems in precisely the wrong orientation: will every pedal stroke not contribute to compressing the shock? Could it make for a bouncy rear on steep climbs? The shock on my Fuego is pretty much perpendicular to the chain run.

User avatar
squeaker
Posts: 3520
Joined: 12 Jan 2007, 11:43pm
Location: Sussex

Re: Challenge suspension explain?

Postby squeaker » 27 Feb 2019, 8:46am

hercule wrote:I've never ridden (or seen) one, but that suspension shock seems in precisely the wrong orientation: will every pedal stroke not contribute to compressing the shock? Could it make for a bouncy rear on steep climbs? The shock on my Fuego is pretty much perpendicular to the chain run.
Suspension element location is fairly irrelevant (except for exposure to the elements and internal damping circuits), IMHO. It's the relation of the chain to the rear suspension main pivot point that counts. See online for discussions about virtual pivot point suspensions, for example.
"42"

User avatar
[XAP]Bob
Posts: 16871
Joined: 26 Sep 2008, 4:12pm

Re: Challenge suspension explain?

Postby [XAP]Bob » 27 Feb 2019, 8:49am

And depends on the linkages as well, it’s fairly easy to construct a suspension geometry with the shock in any direction you like. It doesn’t change the behaviour of the suspension, just thenpackaging.
A shortcut has to be a challenge, otherwise it would just be the way. No situation is so dire that panic cannot make it worse.
There are two kinds of people in this world: those can extrapolate from incomplete data.

hercule
Posts: 940
Joined: 5 Feb 2011, 5:18pm

Re: Challenge suspension explain?

Postby hercule » 27 Feb 2019, 7:30pm

Yes, of course, wasn’t thinking it through... looks like the chain passes though the centre line of the pivot so effects should be minimal. By contrast the chain runs substantially below the pivot on my BikeE AT and mashing the pedals can make for a pogoing experience!