Shopping? Check out our latest product comparisons

Scurra Hard Enduro mountain bike has a wild take on front suspension

By

September 20, 2013

The dual-suspension Hard Enduro mountain bike has two rear shocks ... although one of them...

The dual-suspension Hard Enduro mountain bike has two rear shocks ... although one of them serves as a front shock

Image Gallery (14 images)

When Gizmag was poking around at Interbike 2013 earlier this week, we were particularly interested in finding unique products that would catch the eye of even non-cyclists. Well, when we saw Scurra's Hard Enduro mountain bike, we knew we'd hit pay dirt. The bizarre-looking bike forgoes a traditional telescopic suspension fork, and instead uses a linkage combined with a rear shock for its front suspension. The setup allows for seven inches (178 mm) of travel, along with some other claimed benefits.

Scurra founder/engineer Martin Trebichavsky was quick to point out that the two bikes on display were proof-of-concept prototypes, and that a commercial version of the Hard Enduro would be considerably simpler and lighter ... although at 33 pounds (15 kg), the existing bikes aren't obscenely overweight as it is.

The patented Trelever front suspension utilizes a pivoting parallelogram system, to link the front wheel to a stock DT Swiss M212 rear shock. That shock is located in the middle of the aluminum frame, and sits head-to-head with another identical shock, which handles the rear suspension.

The two identical shocks sit head-to-head

Trebichavsky says that in its current form, the Trelever system weighs roughly the same as some suspension forks. It would be good to see it lose at least a bit of that weight, though, as the one bike that we lifted did feel slightly front-heavy.

Martin also told us that along with its seven inches of travel (for a 29-inch wheel), one of Trelever's other selling points is its enhanced front wheel control. It is also said to offer a minimum of suspension response lag, low unsuspended mass, and a very stable yet agile ride.

The best way to verify these claims, of course, is to try out a commercial version of the Hard Enduro for yourself. That probably won't be possible until at least next March, when the bike is scheduled to reach the market. It should be priced at a rather intimidating €9,000 (US$12,000), which will include a transport case.

For another interesting approach to mountain bike front suspensions, take a look at the Lauf leaf-style fork.

Sources: Scurra, Trelever

About the Author
Ben Coxworth An experienced freelance writer, videographer and television producer, Ben's interest in all forms of innovation is particularly fanatical when it comes to human-powered transportation, film-making gear, environmentally-friendly technologies and anything that's designed to go underwater. He lives in Edmonton, Alberta, where he spends a lot of time going over the handlebars of his mountain bike, hanging out in off-leash parks, and wishing the Pacific Ocean wasn't so far away.   All articles by Ben Coxworth
12 Comments

Twelve grand? For a BIKE???!!!! For that sort of money the 'transport case' had better come with an engine, 4WD and a decent stereo...

dalroth5
21st September, 2013 @ 12:35 pm PDT

Bike prices have been getting stupid in recent years.

This design is almost identical to Whyte Bikes' PRST1 and JW-2 bikes from 2000! This design looks rather more fragile and less practical though. It's also similar (in layout) to Muddy Fox's "Interactive" system from 1995, though that did even freakier stuff by synchronising front and rear suspension!

I like this kind of design - one of the problems with regular telescopic forks is that stiction (resistance to initial movement, static friction in the fork due to contamination, poor lubrication etc) is relatively large as there is 1:1 relationship between movement of the suspension and the wheel. Rear suspension tends to be much smoother as the wheel has far more leverage on a shorter shock (e.g. the shock on an 8" travel bike might only compress by 2"), so stiction's static friction is more easily overcome and you get better small-bump performance.

Silly price though.

Synchro
22nd September, 2013 @ 09:19 am PDT

29"? I see 27.5" on the tyres.

I agree $12K is ludicrous for this monstrosity. I get that it’s a prototype but it’s still ugly as sin and too heavy.

The components are not even high end and for that price I'd be expecting the very best.

10/10 for ingenuity though.

PaleDale
22nd September, 2013 @ 03:03 pm PDT

Bike PRICES have been geeting stupid, I'd say this design is stupid.

I must have missed where everyone was complaining about the poor performance of reasonably priced telescopic forks and the need for something else.

flibb
23rd September, 2013 @ 01:12 am PDT

It seems that this suspension design would allow the front tire to rotate back toward the frame when under compression.

I'm not up to speed on the technicalities of mountain biking but wouldn't this be detrimental? It seems to me that if the tire/wheel rotated back that it would take energy away from the riders forward momentum, I may be looking at it all wrong though.

Rt1583
23rd September, 2013 @ 06:25 am PDT

Making things more complicated for marginal gains always works out well plus as we see here never hurts the price either. Plus this design is really a looker isn't it?

Jon Smith
23rd September, 2013 @ 08:41 am PDT

Looks kinda like an awkward cross between an Earles fork and BMW's telelever suspension.

Bahnstormer
23rd September, 2013 @ 09:19 am PDT

The theory of the wheel moving to the rear of the vehicle comes from off road buggy racing. The principle is that the rearward movement takes the wheel away from the obstruction which makes the jolt less severe. The old VW trailing arm front-end is a perfect example.

Maverick62
24th September, 2013 @ 09:30 am PDT

I think suspension itself on bicycles is over rated. Like, how hard core are you really at peddling that your bicycle actually needs a suspension to deal with your awesome?

I barely know anyone with a suspension bicycle that leaves pavement on it and most real world people keep it under about 20 MPH.

Competitive/fast down hill mountain biking is the single instance I can even think of where suspension is needed and that makes up about 0.0001% of actual cycling.

Nearly all of that other 99.99% of the time the suspension adds useless weight to the bicycle and absorbs some of your wrath when you do try on some gohard.

Daishi
24th September, 2013 @ 10:25 am PDT

Diachi with all due respect I don't think you know what you are talking about, just because you don't know any real mountain bikers (and there are a lot of us) doesn't mean we don't need suspension. Cars could still drive without suspension so lets get rid of that. Sure it will not handle well, cause loss of control and take most the pleasure out of a drive, but hey it will be light and cheap right? I don't race competitively but I own several hard-tail, no suspension and long travel bikes, and each has its place but the rigid would never come out alive of a real bike trail ridden with any kind of normal speed.

fckgravity
25th September, 2013 @ 11:42 am PDT

Diachi, I have seen some pro all-mountain races where some riders are dropping off 3-4 foot boulders on the course on a fully rigid 29ers. Most people, I think, would prefer something to cushion the impact. Granted most people don't drop off anything remotely that big either, but at 20 mph going down steep loose trails covered in marbles, moon dust, and braking bumps, properly balanced suspension is a godsend in maintaining rubber-to-dirt contact. Suspension is also easier on the joints especially wrists and elbows. Error correction insurance for when you have to cover some unplanned lines is another bonus. As far as weight is concerned, on a 20 mile ride, the extra water, tubes, pump, tools, and the pre-ride cheeseburger would vastly outweigh the additional components. I'm not dismissing the full-rigid setup entirely, but it has it's place. It's great for XC-style courses. When the bumps gets bigger and more frequent, however, the plush afforded by an appropriated amount of suspension travel dramatically increases the fun factor while reducing the post ride pain factor. Some of us who no longer own 20-year-old joints.

sk8dad
14th November, 2013 @ 04:28 pm PST

front suspension is innovative and good for city ride

but

"if during full suspension compression(incase if a big shock) if the rider turns the steering more than 35degrees in either left or right direction , the suspension will through the steering in the same direction along with the additional force gained from that shock..

Good Design Though

Regards

imran Sheikh

Imran Sheikh
10th February, 2014 @ 05:14 pm PST
Post a Comment

Login with your gizmag account:

Or Login with Facebook:


Related Articles
Looking for something? Search our 27,862 articles