Tag Archives: Under Test

Under Test: Easton Components

Easton_Bar-Stem-min Easton_Post-min

Setting up a gravel or adventure bike sometimes requires mixing road and mountain components. Dialing in fit can be a challenge, but Easton offers a wide range of handlebars, stems, and seatposts in both aluminum and carbon fiber. I outfitted my new test bike with the company’s EX90 SLX carbon drop bars, and alloy EA70 stem and seatpost. How will these parts hold up to mixed-surface recreational riding and commuting?

Stay tuned…

Salsa Vaya 650B Conversion Project (Lessons Learned)

You’ve read GRAVELBIKE’s series of articles on 650B conversions, and now you’re thinking about converting one of your own bikes. While the process is relatively simple, every bike (and setup) is a little different, and there’s always the possibility of a gotcha lurking in the shadows. After spending countless hours testing various wheels, tires, and other components, we’ve compiled a list of tricks, tips, and lessons learned that’ll make your 650B conversion that much easier.

Mind The Gap
Tire casings relax and typically plump up a few millimeters after being inflated for 24-48 hours. Check your tires’ clearance a day or two after the initial installation to confirm that there is still adequate clearance at the frame, fork, or fenders. When in doubt, opt for a narrower tire, especially if you’ll be riding in muddy or snowy conditions.

Keep It Simple
If you plan on swapping wheels for different terrain or conditions, try to use the same components on both wheels. Having to adjust brake calipers or rear derailleurs every time you change wheels can be time consuming and frustrating. Sure, practice can make the task easier, but when both wheelsets have the same hubs, cassettes, and rotors, you can spend more time riding.

Know Thy Limits
Fat tires and low gears can take you to some exciting new places. If you haven’t ridden a particular bike off-road prior to the 650B conversion, take it easy until you’re comfortable with the new wheels’ affect on handling and braking (both on- and off-pavement). This is especially important if the different wheels affect bottom bracket height or steering geometry.

Looking for even more info on 650B wheels and tires? Check out the 650B Google Group, or the 27.5 – 650B forum on MTBR.com

Salsa Vaya 650B Conversion Project (Wheels & Tires)

Welcome to the second installment of GRAVELBIKE’s series on converting the Salsa Vaya to 650B wheels. Previously, we covered the why, and in this post, we’ll explain the how.

If you’re wondering why someone would go to the trouble of converting a bike like the Salsa Vaya to 650B/27.5″ wheels, the answer is volume. Specifically, air volume. A 650B/27.5″ knobby has the same outside diameter as a 700×38 cross or touring tire. The 650B rim, however, is smaller than a 700C rim, giving you more tire height (or volume). That added height/volume allows you to run lower air pressure (with reduced risk of pinch-flatting), which smooths out the ride and improves traction when riding off-road.

GRAVELBIKE.com gravel grinder 650B 27.5 Continental Kenda

Both tires have a diameter of 705mm, but the 650B tire (right) has 45% more height than the 700C tire (left).

Thanks to the growing popularity of 27.5″ tires in the MTB world, nearly every manufacturer offers compatible wheels and rims. For this project, we selected Bicycle Wheel Warehouse’s 650B Pure Enduro Pro wheelset. The 26mm wide rim can easily accommodate 2.5″ wide tires, yet weighs only 420g. With the company’s PURE-branded D400 hubs (32h) and Sapim CX-Ray spokes, the Enduro Pro wheels came in at 731g front and 831g rear. We used inner tubes during the majority of the testing, but had no trouble running Hutchinson Cobra tires without tubes (using Stan’s rim strips and Slime tubeless sealant). During the test period (several weeks of daily riding), the only necessary maintenance was tightening the rear hub’s end-caps after the initial break-in period. Both hubs’ seals proved effective at keeping out water and dirt, despite being ridden in record-breaking rainstorms.

GRAVELBIKE.com gravel grinder 650B 27.5 BWW Bicycle Wheel Warehouse Pure Enduro Avid BB7 Hayes

Bicycle Wheel Warehouse PURE D400 front hub.

When retrofitting a 700C- or 26″-wheeled bike with 650B wheels, be aware that not all 650B/27.5″ knobbies will fit. In the case of the Vaya, lateral clearance was more of an issue than vertical clearance. Keep in mind that tires often measure-out differently than their stated size. Actual dimensions can vary by manufacturer, and in some cases, even between different models from a single company. Another factor to consider is rim width. Wider rims can change a tire’s profile, increasing the effective size (thereby reducing clearance). Lastly, it’s not uncommon for tire casings to relax (or stretch) after they’ve been mounted and inflated (every tire that we tested measured 1-3mm wider 24-48 hours after installation).

Tires are listed alphabetically by name, and include the inch-based and metric sizes as per the manufacturer. Note that there is no winner because we didn’t view the project as a contest. Each tire performed well, and had its own strengths and weaknesses. Tire preference–like many choices in cycling–is often subjective at best. The ratings (1-5, with 5 being the best) are relative to the other tires tested. A tire that received a 5/5 pavement rating would be smoother-riding than a tire that received a 3/5 rating, but that 5/5 tire won’t be faster on-road than a 25mm tubular. Tires were evaluated by the following criteria:

  • Pavement–performance on paved roads; higher-rated tires ride smoother and quieter
  • Hard-pack–performance on hardpacked dirt roads or trails; higher-rated tires offer improved speed and traction
  • Soft-pack–performance on soft, damp, or loamy trails; higher rated tires offer improved traction and control and shed mud easily
  • Gravel–performance on gravel roads or trails; higher rated tires offer improved traction and control

Hutchinson Cobra
GRAVELBIKE.com gravel grinder 27.5 650B Hutchinson IRD Kenda Vee Rubber

  • Size: 27.5 x 2.25 / 54 – 584
  • Pavement: 3.5
  • Hard-pack: 4.5
  • Soft-pack: 3
  • Gravel: 3.5

IRD Fire XC Pro
GRAVELBIKE.com gravel grinder 27.5 650B Hutchinson IRD Kenda Vee Rubber

  • Size: 27.5 x 2.1 / 50 – 584
  • Pavement: 2.5
  • Hard-pack: 3
  • Soft-pack: 4.5
  • Gravel: 4

Kenda Karma
GRAVELBIKE.com gravel grinder 27.5 650B Hutchinson IRD Kenda Vee Rubber

  • Size: 27.5 x 2.00 / 52 – 584
  • Pavement: 2.5
  • Hard-pack: 3
  • Soft-pack: 4
  • Gravel: 3.5

Kenda Nevegal
GRAVELBIKE.com gravel grinder 27.5 650B Hutchinson IRD Kenda Vee Rubber

  • Size: 27.5 x 2.10 / 52 – 584
  • Pavement: 2.5
  • Hard-pack: 3
  • Soft-pack: 4
  • Gravel: 4

Kenda Slant Six Pro
GRAVELBIKE.com gravel grinder 27.5 650B Hutchinson IRD Kenda Vee Rubber

  • Size: 27.5 x 2.10 / 52 – 584
  • Pavement: 3
  • Hard-pack: 4
  • Soft-pack: 3.5
  • Gravel: 4

Vee Rubber V6
GRAVELBIKE.com gravel grinder 27.5 650B Hutchinson IRD Kenda Vee Rubber

  • Size: 27.5 x 2.10 / 54 – 584
  • Pavement: 4
  • Hard-pack: 5
  • Soft-pack: 3
  • Gravel: 3.5

Vee Rubber V10
GRAVELBIKE.com gravel grinder 27.5 650B Hutchinson IRD Kenda Vee Rubber

  • Size: 27.5 x 2.10 / 54 – 584
  • Pavement: 4.5
  • Hard-pack: 4.5
  • Soft-pack: 3
  • Gravel: 3

Vee Rubber V12
GRAVELBIKE.com gravel grinder 27.5 650B Hutchinson IRD Kenda Vee Rubber

  • Size: 27.5 x 2.10 / 54 – 584
  • Pavement: 5
  • Hard-pack: 4
  • Soft-pack: 2.5
  • Gravel: 2.5

Disclosure: Bicycle Wheel Warehouse, Hutchinson, IRD, Kenda, and Vee Rubber provided product samples for this article, but offered no other form of compensation for this review.