The result was a hodgepodge of design specifications that can confound the consumer trying to figure out what replacement bottom bracket he needs, especially if it is an older bike. Sophisticated frame design for a comfortable upright riding position and easy mount. Sometimes the cups just won't go in and the shell has to be tapped with an ISO tap. Ride for miles effortlessly with premium drivetrain and a rigid fork for efficiency.

Crossover from fitness to commuters. Welcome, and congratulations on the purchase of your new Northrock Bicycle.

Other Races The aluminum 6061 lightweight frame is designed to be strong and sturdy, yet light for superior handling. It is recommended that you read through the Quick Assembly Guide and Owner's Manual prior to assembling you bicycle.

French: 35mm x 1.0mm. Swiss: Also 35mm x 1.0mm like the French BB, but the fixed cup has left-handed threads. Contact

This spec can also show up on old Motobecanes. All-aluminum frame and 29" wheels deliver less rolling friction and more traction to tackle any terrain. A traditional bottom bracket has 2 bearing cups that screw into the frame, a right hand, or fixed cup and a left side cup. Photo Galleries, Glossary, Terms, Lists XC6. The fixed cup is the one that goes on the chainring side. For an explanation of what the above chart means let's start with the classic picture of a bottom bracket shell from an old Campagnolo catalog: This is a view of the bottom bracket shell from underneath the bike, It is for what is now an older style 3-piece crankset (the crank arms slide onto a steel tapered axle). Expertly blended componentry and lightweight frame design enhance performance. As rugged as the mountain, the XC6 is designed to perform. google_ad_slot = "0004268070"; There are 3 common basic BB thread types: English: 1.370" x 24 TPI. Smooth tires for paved surfaces. Italian: 36mm x 24 TPI. A bicycle bottom bracket (often called the "BB" by bicycle mechanics) is that bearing and axle assembly that the crank arms are attached to. Site Map, lengthy explanation of what is involved in preparing a frame to be assembled, KOM: A Guide to //-->, Tour de France Northrock - xc6 As rugged as the mountain, the XC6 is designed to perform. Another old British spec that will turn up most often on tandems. Tackle any terrain effortlessly with a SHIMANO crank and SHIMANO ACERA drivetrain with 24 … For customer service call 1-866-967-2766, Monday thru Friday, 9:OOAM – 5:OOPM Eastern Standard Time. Experience performance, efficiency and speed like never before.
All-aluminum frame and 29" wheels deliver less rolling friction and more traction to tackle any terrain. The second cup is the left hand, or adjustable cup.

google_ad_client = "ca-pub-2062310126166513"; The fixed cup is the one that goes on the chainring side. The OC Women's cruiser model is designed with quality, function and style. Paved Road Climbs

An explanation for all these bb types is just below the chart. Take the time to complete your bicycle registration. go » XC29. Sophisticated frame design for a comfortable upright riding position and easy mount. ), 68mm, google_ad_width = 300; 73mm oversize, © Copyright Northrock Bikes 2020. go » Comfort. google_ad_height = 90; © Copyright Northrock Bikes 2020. google_ad_slot = "2395833724"; Food This usually varies from 65mm to 70mm but in some cases can go to 72mm. All Northrock bikes come with a Quick Assembly Guide specific to your model. Aluminum lightweight frame for stiffness and durability, WTB shock absorbing saddle with high-set padding for maximum comfort, SHIMANO true and proven Altus shifters with integrated brake levers for performance and reliability, TEKTRO disc brakes for reliable, ultimate stopping, SR Suntour XCT front suspension, preload 80mm to handle unpredictable terrain, WTB 26x2.1 Moto Raptor tires for superior climbing, braking, and cornering, Alloy lightweight rustproof rims with 14g stainless steel spokes, SHIMANO crank for performance and durability, SHIMANO ACERA drivetrain with 24 speeds allow you to effortlessly tackle any terrain, KMC lightweight chain for superior strength and durability, Rustproof clear-coat finish for a lasting luster. The Japanese, Taiwanese and Chinese manufacturers chose to use English bottom brackets. Click here for our FAQ page for guidance on some of our most commonly asked questions. Smooth tires for paved surfaces.
Italian bike makers sold most of their goods in Italy; French makers concentrated on French customers and British makers made bikes for their home market. The Northrock XC6 Mountain Bike is available in an 18″ or 19.5″ frame size. It usually has no adjustability. XC6. Inspired by the natural beauty of the coast.

Experience performance, efficiency and speed like never before. CL5.

Comix Track frames can use 65mm shell to pull the arms in a little closer to the center line of the frame to give the pedals a little more clearance on a banked track. It is installed first and it tightened until the flats on the cup are snug against the bottom bracket shell.

Alloy lightweight rustproof rims with stainless steel spokes and a KMC lightweight add to the strength and durability of the XC6. Smooth tires for paved surfaces. Training & Coaching All-aluminum frame and 29" wheels deliver less rolling friction and more traction to tackle any terrain.

It usually has no adjustability. First of all, note the center measurement, the width of the bottom bracket shell. Today, French export production generally uses English BBs, but there are millions of bikes out there with French BBs because a lot of the bike boom bikes of the late 60s and early 70s were French. After making sure that it is optimally tight so that the bearings run freely, without binding, it is in some way locked down. google_ad_client = "ca-pub-2062310126166513"; Even some Italian makers build with English bb shells now. Paved Road Climbs. A lightweight frame and fork give you freedom to choose your ride - street, park, or dirt. Click here.

If you are restoring an old bike you may need a thread gauge. Bikes & Travel The bottom bracket diameter is slightly smaller than the Italian and has one thread per millimeter. Because component manufacturers have to make bottom brackets that will fit a wide variety of bicycles, built with varying degrees of precision, the left cup is installed last. Stuff We Like, Rider Histories /* bottom text banner, created 2/9/09 */ Here is a lengthy explanation of what is involved in preparing a frame to be assembled.

It's 5 thousandths of an inch bigger in diameter and is reasonably compatible with standard English-threaded parts.


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