|Excellent questions, scrotes, especially since there are so many chain guide options out there to suit different styles of riding and types of bikes. I see that you're looking to fit this guide to your 2013 Trek Slash 8, and that it's running a single chain ring and a ten-speed drivetrain that doesn't employ a clutch derailleur, meaning that you'll likely need to consider a full guide rather than a minimalist top-only unit. Your concerns about reliability have me thinking that the simplest full guide on the market could be best for you, which has to be Straitline's Silent Guide. Rather than a roller that spins on a sealed bearing, it uses polyurethane "sliders" at the top and bottom that provide both chain tension and security. Yes, the rollers will wear over time, but replacements are easy to install and relatively inexpensive. More importantly, there is basically nothing to go wrong, so long as you set it up correctly. The other reason that I'd suggest the Silent Guide is for its full-coverage aluminum bash guard that will keep your expensive narrow/wide chain ring from being damaged. As for your second questions, "ISCG 03" and ISCG are the same thing, but the correct name for it is the latter version. It's sometimes also referred to as "ISCG Old", which is odd because it is still used today on many bikes, and the layout's bolt circle diameter is smaller than what ISCG 05 utilizes. - Mike Levy|
|No worries. Normally, a 51-millimeter offset would be optimum for a 140 to 150-millimeter-travel fork on a 29er with a 67-degree or slacker head angle. A 47 or 48mm offset fork will be perfect for a 120mm travel fork on your BMC 29er, especially because it has a steepish, 70-degree head angle. Larger wheel diameters require more for offset to produce the same measure of trail. Slacker head angles also require slightly more fork offset. Your bike, with its steeper head angle and minimal fork travel, probably should have come stock with the same 48-millimeter offset that your new Magura fork will have. - RC|
Most fork makers offer 29er forks with offsets around 47 and 50 millimeters to keep the steering stable and feeling light at the bars. The XC-oriented BMC's Four Stroke should handle best with the shorter of the two offset options.
|The Enduro Evo should definitely be able to handle whatever you can dish out - Mike Montgomery chose to use one at last year's Red Bull Rampage, and the Specialized team has been using 27.5" versions at the first two stops of the World Cup. You won't be winning any hill climb competitions, since its burly build puts it close to the 35lb mark, but it'll definitely be more pedal friendly than your Wilson. I spent time on our test bike in the Whistler Bike Park as well as on some of the burlier trails here in the Pacific Northwest and was impressed with how it was able to make short work of the most technical trails. You might even want to consider the non-Evo Enduro, especially if you're only going to be riding the bike park twice a year. Modern all-mountain bikes are more versatile than ever, and you're not the only one wondering whether or not they really need a full-on DH sled anymore. In the end, I would recommend purchasing a bike that best fits the terrain you spend the majority of your time on. Just like it's silly to have a jacked up Hummer with mud tires on it as a daily driver in the city, it doesn't make sense to have a long travel DH rig when a lighter, shorter travel machine would be just as fun, and take much less effort to get to the top. - Mike Kazimer|
We liked Specialized 's Enduro Expert EVO when we reviewed it in 2013, and our opinion remains the same today.
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