วันพฤหัสบดีที่ 10 เมษายน พ.ศ. 2551

Copperhead Triple Seoul










I'm almost ashamed to submit this after seeing some of the beautiful machined lights that some of you have built lately, but in the interest of the common folk who don't have a lathe... here goes.
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I had a little time over the holidays and decided to try something different. Having admired the simplicity of the lights I'd seen being built using copper tubing, I thought I'd try incorporating that into the design. The build is simple, but the copper adds about 30g to the weight of the light (compared to my all aluminum design). The heatsink fins are probably not necessary, but do add a nice look (subjective) and some additional cooling. I'll be posting build photos at my website soon.



The light is made from one inch square aluminum tubing and 3, 3/4" copper pipe end caps (they actually measure about 7/8" (22mm) ID. The build would not be hard at all if you didn't have to cut some length off of the copper caps. I've used Arctic Alumina Adhesive to attach the copper caps to the aluminum body. Time will tell if this holds up, but I have some other AAA'd parts that have held well, so this is sort of an experiment (aren't most DIY builds?). The heatsink fins (3/8" aluminum C channel) are AAA'd on as well, and I made two aluminum end caps for the aluminum body and molded some JB weld onto them so that they will fit into body and stay put with some silicone caulk. This will be a handlebar mount and I still have to make the bottom part to connect to the bracket that I am using.

The output looks about the same as my other Triple SSC P4 lights, bright, and a lot of light for the money.

Inside: 3x SSC P4 U-bin, 2x15 degree and 1x5 degree L2 20mm optic.
A 3023 wired Buckpuck @ 1A, with dimming (uses a 5k pot).
A standard Type M DC power connector is used.
14.8v, 4A Li-Ion battery pack.

My son came up with the name Copperhead. Time will tell if the AAA holds the copper caps onto the aluminum body. Since I'm planning this as a bar mount, it will receive a lot more vibration than a helmet mounted light.

Buyer's Guide from Bicycling.com



Product Features
  • SIZES: 15, 17, 19 in.
  • FRAME: Aluminum frame; FOX DHX Air 5.0 shock w/ 150mm travel
  • FORK: RockShox Lyrik Solo Air fork w/ 160mm travel
  • COMPONENTS: SRAM X.9 shifters, rear derailleur; Shimano Saint front derailleur; FSA Gravity Gap crankset; Avid Juicy 7 disc brakes


Get it Here

  • Editorial Review
  • Part Of The Regal DW-Link Family Wide Stance: The 6point6 frame uses 150mm rear-wheel spacing, increasing spoke triangulation for a stronger rear wheel. An 83mm-wide bottom bracket maintains the proper chain line and also allows more tire clearance. Family Lines: We've sampled IH's DW-Link suspension in 3.5-, 5-, 7- and 8-inch-travel modes and, in every case, have been very impressed.

วันพุธที่ 9 เมษายน พ.ศ. 2551

Iron Horse Warrior Pro : Review

The Budget Rider’s Dream Machine

We don’t kid ourselves into believing that all of our readers have endless pockets when it comes to mountain biking. For every rider out there who nods their head in agreement with our $5000 bike tests, there are a dozen shaking their heads in disbelief. Fortunately, Iron Horse understands where you’re coming from and has priced their Warrior Pro DS accordingly. This a bike that truly allows the sport to be experienced without the steep price tag generally associated with a high-end bicycle.

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Speaking of Specs

For $899 our Warrior Pro DS came equipped with the Manitou Splice Comp (130mm) fork up front and the Fox Vanilla R Coil-over shock connected to a single pivot linkage in the rear. Truvativ provided the bar and stem while the headset was a Zero Stack. Interestingly while the front derailleur is Shimano Deore, the rear is an SRAM X-7 as is the 9 speed PG-950 cassette. Shifters are SRAM X-7 while brake levers are Avid FR-5. Braking is handled by Avid BB5 manual discs (6” rotors). Rounding out the package are WTB’s Pure V Sport saddle, SX-24 rims, and Weirwolf tires.

We tested the 19” frame size (frames are available between 15 and 21 inches in increments of 2) in flashy acid green paint.

Riders of all skill levels have simply got to agree on one thing, for the price, this is a whole lotta bike!

Impressions

Swinging a leg over the Warrior Pro is an interesting sensation initially. The bike feels much more solid and sure footed then a dedicated cross country rig or even a slightly beefier trail bike. The cockpit is roomy and well laid out, with a fairly short reach to the riser bar. We spent a few hours tweaking the suspension, the fork especially, in effort to get the chassis to feel balanced. Ultimately we settled on a slightly slowed rebound setting to keep the front end plush and active. Straight off the sales floor, the Manitou Splice Comp tends to feel a little springy which results in added load to the much more refined Fox Vanilla R coil-over shock and single pivot linkage in the rear. Once satisfied with a more slow-terrain receptive fork, we took the Warrior Pro out hunting.

Terrain Talking

Unfortunately our time with the Iron Horse was fairly limited as we were forced to borrow a demo model from a local dealership rather then spend a customary month with the straight from the factory test unit. As such, our test terrain consisted of a full day of fairly flat but twisty singletrack behind the LBS and an evening of high elevation gravel roads with occasional small (1-3 foot) drops.

From The Saddle

The Warrior Pro felt immediately at home on the sweeping gravel back roads whereas really tight singletrack tended to give the bike fits of foot dabbing. Due to its more roomy and laid back cockpit geometry, the Warrior Pro has a tendency to prefer wide gradual turning over tight switch backs that made the middle of the bike want to jackknife. Fortunately as the speeds increased, so too did the bike’s handling prowess. While the chassis felt rather vague and uncertain in the slow technical areas, it came to life once we were able to carry our momentum around the sweepers. Finding a comfortable flowing rhythm is the best way to get the Warrior Pro huffing.

Once we struck a decent balance between the fork and shock (by softening the fork), the front end of the bike flew a true course in which terrain feedback was present but drops and hits transferred very little harshness up to the rider’s arms.

While we had some jitters to work out with the front end, the shock’s performance was far more delightful from the get-go. Perhaps due in part to the fact that we have a lot of experience working with Fox’s coil-over Vanilla R as it graces one of our test staff’s favorite bikes of all time, the KHS AM 1000. While KHS uses the shock in a very effective 4-bar linkage system, Iron Horse chose to run the single pivot design most likely as a cost shaving effort. Fortunately while not quite as dialed in as the KHS set-up, the Warrior Pro isn’t too far off. We were impressed with the shock’s ability to resist pedal bob while remaining active enough to pick up the stutters and clutter of the gravel roads. Even more impressive was the rear end’s performance once we got both wheels off the ground. Despite some pretty intense flat landing drops, we were quite unable to blow through all of the shock’s travel. Our best advice is not to give up on the suspension even if it feels discombobulated initially. The bike has potential harmony between the Manitou fork and the Vanilla shock that may not be immediately revealed.

In the climbing department, the Warrior Pro feels a bit bulky, especially when approaching a grade without momentum to rely on. Fortunately the SRAM gear set dips low enough (and is coupled surprisingly up to par, slowing the bike down with steady, metered modulation. Downhill stability combined perfectly with the linear pull of manual disc brakes added up to a confidence inspiring package on the descents. While there were instances where high speed sweepers and a case of rapidly shrinking real-estate had us wishing for the more authoritative grip of a good set of hydraulic stoppers, Avid proves that the manual disc isn’t dead yet.

What’s The Bottom Line?

Out on the trails it is very easy to forget that the entire Warrior Pro costs less then the suspension components alone. Thanks to a build that isn’t exceptional but is acceptable (and competent) in nearly every single aspect of enjoying the trails. While it isn’t near light enough to be a top choice for a weight conscious cross country rider or strong enough for big hit/ stunt riding, its strength lies somewhere in the middle. Specifically where the heart of mountain biking lies: out on the trails.

This bike is easily a top contender in the category of entry level experimentation. For the price you would be hard pressed to find a better deal anywhere especially as a beginner looking to find his place in the off-road world. We recommend the Iron Horse Warrior Pro as a starting point. Where you end up is a question only you can answer.

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