"21.1 stems"
Did you mean:
Contact Modern Bike via email, telephone, or showroom visit.
learn more
You may check the order status of a recent purchase to learn if it has been delayed, when it may ship, or if it has already been shipped.
check order status
Your Shopping Cart contains 0 products. View your cart to change product quantities, apply deal codes, or checkout.
Showing 489 products:
Material Alloy/Steel 4 bolt clamp 21.1mm Dia. quill Type: BMX Quill Quill Diameter: 21.1mm Length: 50 Bar Clamp … read more
your price $25.19
BuyPART NUM 763797Dan Kruk's signature Network frame has been tested in the lab and in the streets for a solid year and we are now beyond hyped to finally bring it to you. … read more
$127 offretail $425.99 your price $298.19 + ships free
BuyPART NUM 267908Dan Kruk's signature Network frame has been tested in the lab and in the streets for a solid year and we are now beyond hyped to finally bring it to you. … read more
$127 offretail $425.99 your price $298.19 + ships free
BuyPART NUM 792396Dan Kruk’s signature Network frame has been tested in the lab and in the streets for a solid year and we are now beyond hyped to finally bring it to you. … read more
$123 offretail $409.99 your price $286.99 + ships free
BuyPART NUM 629950Dan Kruk’s signature Network frame has been tested in the lab and in the streets for a solid year and we are now beyond hyped to finally bring it to you. … read more
$121 offretail $405.99 your price $284.19 + ships free
BuyPART NUM 617951The smooth rolling G-One profile makes it a pleasure to ride over forest paths and rolling fields. Weight (oz): 21.1 Defined Color: Black Weight: 600 … read more
7% offretail $59.00 your price $54.87 + ships free
BuyPART NUM 853176Two-piece construction allows up to 2 degrees of displacement to help isolate the handlebar from high frequency vibrations and road shock … read more
your price $99.99 + ships free
BuyPART NUM 392863Two-piece construction allows up to 2 degrees of displacement to help isolate the handlebar from high frequency vibrations and road shock … read more
your price $99.99 + ships free
BuyPART NUM 231872Two-piece construction allows up to 2 degrees of displacement to help isolate the handlebar from high frequency vibrations and road shock … read more
your price $99.99 + ships free
BuyPART NUM 756431Replacement bolts for Super Logic stems. Original equipment stem hardware ensures exact fit and finish. Bit Size: 4mm Includes M5x18L x … read more
your price $9.95
BuyPART NUM 797977Replacement bolts for Super Logic stems. Original equipment stem hardware ensures exact fit and finish. Bit Size: Torx 20 Length: 15L … read more
your price $9.95
BuyPART NUM 685074Replacement bolts for Super Logic stems. Original equipment stem hardware ensures exact fit and finish. Bit Size: 4mm Includes T20-M4x15L … read more
your price $9.95
BuyPART NUM 905805Replacement bolts for Super Logic stems. Original equipment stem hardware ensures exact fit and finish. Bit Size: 4mm Includes M5*P0.8*16L … read more
your price $9.95
BuyPART NUM 178033Material Alloy/Steel 4 bolt clamp Hollow core stem bolt Steerer: 4-1/4" … read more
your price $39.99 + ships free
BuyPART NUM 158858Nitto MT Column cold-forged aluminum with knurled clamp surface. Approximately 25mm rise increase if used with 1-1/8" headset spacer 130mm … read more
your price $45.00
BuyPART NUM 164815Nitto MT Column cold-forged aluminum with knurled clamp surface. Approximately 25mm rise increase if used with 1-1/8" headset spacer 130mm … read more
your price $49.99
BuyPART NUM 91076124.5mm outer width optimizes aerodynamics and tire contact patch For tubeless setup Velocity recommends their 21mm Velotape Item … read more
$8 offretail $148.00 your price $140.00 + ships free
BuyPART NUM 564846Steel cups Steel retainer bearings Available in chrome or black S.H.I.S.: EC32/25.4-24tpi|EC32/26 Color: Chrome Steerer Dia: 25.4 … read more
your price $6.99
BuyPART NUM 793490"W-T-P have always taken a lot of pride in ourselves and in building bikes that are capable of taking everything a rider throws at them. We are constantly at the forefront of developing and manufacturing materials that will with stand hard and furious riding and our designs are made to combat common breaks and bends."
"SCHWALBE NORTH AMERICA prides itself on outstanding customer service, consistency, a superior product at a competitive price, and the endless pursuit of supporting a great sport and a healthy source of transportation."
"Ritchey bicycle components have been raced to victory in some of the biggest cycling competitions in the world including the UCI World Championships, the Tour de France and the Olympics and it all began in a simple garage in Menlo Park, California with Tom Ritchey.'
"Every year bikes change, styles and trends evolve, old bikes are in need of repairs and new bikes are waiting for that personal touch. We provide the means to keep your bike on the road and fun to ride!"
"Simplicity is the hardest design principle to follow; It's at the heart of our approach to eclat."
Dimension makes quality components to repair or custom-fit the vast majority of bikes being ridden today, and provide the accessories that make them fun to ride.
"At Salsa, we believe a sense of adventure makes life better. The bicycle can be so much more than just a bike; it's a path to new places, new people, and amazing experiences."
"Whisky Parts Co. makes high quality carbon components designed with unique features that help you do more with your bike and stand out from the rest. We believe that our work can help every rider find a new level of confidence and performance with our sturdy and lightweight forks, bars, rims and more. So whether you are building a new bike or upgrading one you already have, you'll find an uncommon attention to detail in every product we offer."
"Park Tool has been manufacturing bicycle specific tools since 1963. Based out of St. Paul Minnesota, we are the world's largest bicycle tool manufacturer. A long-term dedication to quality, innovation, and customer service has made Park Tool the first choice of professional and home bicycle mechanics around the world."
"The world's best choose Cane Creek. A key element of Cane Creek's mission is to support the sport of cycling, including racing, charitable activities and cycling advocacy. Cane Creek believes strongly in the power of bicycles and their potential to effect positive change in our society. To that end, Cane Creek supports athletes and teams whose purpose encompasses more than competitive racing, such as getting more people on bikes, improving or promoting a healthy lifestyle, and making our world better through the use of a bike."
Cult makes high quality BMX bikes and components.
"Whether you're riding on hardpack, loose dirt or mud, Maxxis has the tire for you."
"Finish Line has everything a cyclist needs for taking care of their bike and making sure it performs at its peak potential. These products range from bicycle chain lubricants to drivetrain degreasers, from bike washes, specialty brushes and chain cleaning tools, to fluorinated bearing greases and specialty suspension and brake fluids."
"We move forward with a desire to deliver the best possible components to our customers and a determined spirit of competition."
"Incremental enhancements. Perpetual improvements. Revolutionary Innovation. When advancements are continuously made to every attribute of every component, the result is overall performance that is simply second to none. And to real cycling enthusiasts, there is nothing more gratifying then achieving the ultimate ride. And the best part is we just keep making it better. This is what SRAM is all about."
"In 1977, SE Racing was born with the goal of producing innovative BMX bikes for riders everywhere. Soon after, SE produced the first race ready high-end aluminum race bike, the JU-6, featuring stiff Floval tubing. This groundbreaking bike was further modified and became the legendary PK Ripper."
"Shimano practices good local citizenship, pursues continued access to those areas that are enjoyed by outdoor enthusiasts, and is committed to minimizing our impact on the environment."
"At Topeak, exciting new ideas for accessories are spinning at full speed and driving us ahead in a never ending cycle of innovation."
Thomson is leading with innovative design for two primary markets - aerospace and cycling.
"Industry Nine hubs are handmade in Asheville, NC"
"Craig Turner, the founder, spent many years designing aircraft, rockets and racing yachts, with his spare time
consumed by cycling, sailing and designing a large variety of ground breaking consumer products. In 1992
he decided to start one of the first Triathlon stores and build complete Tri bikes weighing as little as 12 lbs.
In 1993 he saw the need for devices to help carry more fluids on longer length triathlons...... XLAB was born.
In 2007, with fi fteen years experience of supplying over 10,000 Tri bikes, he decided to greatly expand the XLAB
range. Today, the XLAB range covers all storage needs for Hydration, Nutrition and Repair for all race lengths
including Sprint, Olympic, Half and Full. With over 90 cutting-edge products XLAB has established
the most winning record in the sport with 24 WORLD TRIATHLON CHAMPIONSHIPS."
"The perfect light whatever your pursuit"
"CatEye is the leading manufacturer of cycle computers, lights and reflectors to cyclists in the world. Founded in 1954 in Osaka, Japan, CatEye has always been a leader in innovation and technology."
"Think all tires look the same? Look closely and you'll see that Kenda Tires perform to the highest standards across several different categories. For the past 50 years, Kenda has been building a better tire for life's most demanding activities. Actually, they overbuild them to ensure you succeed safely in everything you do."
These models are available for online purchasing and can be shipped directly to you.
We define color as the main color of the item. It may have accents or highlights in other colors.
Top Tube Length
Our Lowest Price - This product is ineligible for additional discounts or rebates.
Tire Width
Tire Type
Tire Bead
Tire ISO Diameter
Tire Width Inches
Bar clamp diameter is the diamater of the handlebar.
Stem length is measured from the center of one clamp to the center of the other clamp. This measurement is sometimes known as the reach or extension.
S.H.I.S clamp diameter is the steerer tube diameter.
Stem angles are measured perpendicular to the clamp. For example, a 90 degree stem is straight. Sometimes, this may also be refered to as a 0 degree stem. If two measurements are listed, the stem can be flipped for angling up or down.
Stem Type
These products are one of our best sellers.
Weight
The ISO diameter is the true diameter of the rim and determines which tires are compatible.
Rims are drilled for specific tube valves. Schrader and Presta are the two common choices. Presta valves are the skinny, often threaded type.
Tire type is the type of tire the rim can accept. Some rims can only accept clincher tires. Others are tubeless only. Some are tubeless compatible
Brake Track
The drillings is the number of holes drilled in the rim for spokes. This will match your spoke count and must match with the hub.
S.H.I.S clamp diameter is the steerer tube diameter.
S.H.I.S Lower
S.H.I.S Upper
Crown Race
Buy this product and your entire order ships for free.
Some orders are inelligible for delivery discounts. See offer details for disqualifying products and destinations.