29er Mountain Bike Basics

If you have taken even a casual interest in mountain bikes over the past few years, you have probably heard of the trend to a bigger wheel size, the 29er. Extolled by many and detracted by a few, the verdict is now clear: Mountain bikes with 29-inch wheels are here to stay.

The Pros and Cons of 29er Wheels

So what’s the attraction? 29ers offer several big advantages over their smaller-wheeled siblings:

  • Better momentum once rolling, meaning more progress for less effort and faster rolling over open terrain.
  • A larger tire contact area on the trail, giving better traction and control when climbing or cornering.
  • A higher “attack angle,” meaning the wheels roll over trail obstacles with less impact, reducing fatigue and smoothing out the trail.

Riders report that a 29er gives a feeling of enhanced stability and control, decreasing the “sketchiness” of the riding experience. This means fewer on-trail panic attacks and more confidence and comfort.

Who Can Ride a 29er?

Many people can get a good fit on a 29er, but there are fewer sizing options for short riders (male or female). Why?

The main issue is the standover clearance. A 29er is often taller than a comparably sized 26-inch wheel mountain bike and may be too tall for smaller riders. Toe overlap with the larger wheel and an incorrect handlebar height are other potential concerns for shorter riders. Many 29ers are therefore available in medium, large and extra-large frames, with small frames and women’s specific frames just starting to catch on.

How to Shop for a 29er

Choosing a 29er is the same as selecting any bike: Know your riding intentions and how you want to use the bike.Not all 29ers ride comparably. As with any category of bikes, some models are lighter, faster and nimbler than others. Some 29ers are designed for racers, others for weekend enthusiasts and still others for occasional riders who want one bike to serve a multitude of purposes. Check the product descriptions on REI.com for help with these specifics.

If you are tempted to simply upgrade your existing bike, keep in mind that you would need more than bigger wheels. Unfortunately, 26-inch wheels and 29-inch wheels are not interchangeable on a frame, since frames and suspension are designed to accommodate a specific wheel size.

It’s best to discuss brand and model options with a knowledgeable sales specialist (at REI or other specialty bike shops) to get an understanding of the relationship between bike quality, performance and price. Narrow your selection to 2 or 3 models and be sure to take a test ride to find out which one feels right.

來源︰

https://www.rei.com/learn/expert-advice/29er-mountain-bike.html

DAY TIME RUNNING LIGHTS

WHY LIGHTS DURING THE DAY?

When cars did it, they reduced accidents by 25%. And motorcycles saw a 13% drop. Bicycle Daytime Running Lights just make sense, and all existing research indicates that the single best way for a cyclist to increase the likelihood of being seen by a driver is to use a flashing light that’s daylight visible.Here’s what set ours apart from the others.

FOCUS

FLASH RANGE

Creating a light visible in the daylight requires intentional design. By directing or amplifying output, we intensify the beam or extend its range. Without this, a light may appear bright, but will not be noticed in the day.

Most tail lights use a steady flashing pattern. This pulsing is less noticeable than one that continually varies its intensity and pattern. The Day Flash setting featured on Bontrager Daytime Running Lights was created to specifically increase noticeability with varying outputs and an interruptive flash pattern.

Daytime Running Lights are brighter than what you would use at night in order to give drivers more reaction time. Bontrager Daytime Running Lights are detectable from a greater distance than other lights, from ¼ mile to over 2km away in daylight conditions given the specific model.

THE BEST SOLUTION

2.4X 80%
If you’re looking to reduce the chance of an accident, research suggests that riding with a flashing light that’s daylight visible is the single best product solution to help make a cyclist more noticeable. Using a flashing tail light in the day makes you 2.4x more noticeable than with no lights at all, and 1.4x than in steady mode. Bontrager Daytime Running Lights use an interruptive flash pattern to increase noticeability, specifically in daylight conditions.

8 out of 10 cycling accidents occur during the day. Daytime Running Lights are the single most effective product to help increase your noticeability during the day.

OUR LINEUP

DAYTIME RUNNING LIGHTS

Source quoted from: 

http://www.trekbikes.com/