Our lightweight Zinn Cross Country XC model (and Megabike 29er) is designed for fast cross country riding and racing. Three inches of travel (with a pedal platform) takes the edge off bumps and makes this bike light and more efficient for racers and serious, fast riders. Our Concentrak™ rear suspension design also keeps the rider from experiencing pedal kick back over bumps. The entire swingarm pivots around the bottom bracket shell, which serves as a huge center bolt of this big main pivot to keep everything in alignment and minimize wear.
Megabike XXL with 29" wheels next to size M XC with 26" wheels
Zinn All Mountain FS L
A simple squirt of grease from a standard grease gun into the Zert grease fitting under the bottom bracket shell keeps the huge pivot lubricated and moving smoothly for a very long time, with a minimum of effort and mess. The XC (or Megabike 29er) comes equipped with a Fox RP3 ProPedal fully-adjustable rear shock; DT and Manitou shocks are optional.
This frame gives a smooth, efficient ride and comes in XS, S, M, L, XL, XXL and XXXL sizes for riders up to 6’8” tall. Our formed aluminum monocoque down tubes can be adjusted for volume to provide greater stiffness and strength for bigger riders. The Megabike is the oversized, 29-inch wheel XXL and XXXL-sized version of the XC model. This is a fast, strong, light, long-lasting, nimble bike for a tall rider between 6’4” and 6’9” tall.
Need a big bike with even more travel? Our Gigabike all mountain model in XXL and XXXL size comes with five inches of travel with a low, 2-to-1 leverage ratio, so the shock can operate smoothly at lower pressure for riders over 250 pounds. It is made to fit 29” wheels and has a bottom bracket high enough for 210mm Zinn custom cranks (http://www.zinncycles.com/cranks.aspx)!
The tough Zinn All-Mountain frame is for those who desire a sturdy long travel bike that can be pedaled for long distances. Our Concentrak™ rear suspension design eliminates pedal kickback and keeps the rear tire on the ground with an ample five inches of travel. The massive monocoque down tube and the precision pivot bearings keep this bike tracking where you want no matter the obstacles. This well-balanced bike is perfect for climbing all day while getting the most out of the descents, and it provides a comfortable ride for those epic excursions in the backcountry. Again, in the biggest sizes, it becomes the Gigabike, a 29er.
General Frame Specifications for All Zinn
Full-Suspension Frames
Ø Designed, built, heat treated, painted and powder-coated in Colorado
Ø Extra Small (XS-13”) to Extra Extra Extra Large (XXXL-25”) Sizes
Ø Will fit riders 5’0” to 6’9” tall
Ø Seat tube length is measured center-to-top
Ø 26” wheel size for XS to XL frames
Ø XXL frame size available for either 26” or 29” wheel size
Ø XXXL frames available only for 29” wheel size
Ø Higher bottom bracket on 29” wheel XXL and XXXL models to accommodate extra-long Zinn custom crankarms 190-210mm long
Ø Radius of a 26”X2” inflated tire is 32.5cm; radius of 29”X2” tire is 35.8cm.
XC SPECIFICATIONS (3” TRAVEL)
SIZE
Head Angle
Seat Angle
Top Tube***
BB Height**
Chainstay
XS (13”)
*70/71
*72.7/73.9
21.6” (54.8cm)
12.87”(32.7cm)
16.7”(42.5cm)
S (15”)
*70/71
*72.7/73.9
22.1” (56.2cm)
12.87”(32.7cm)
16.7”(42.5cm)
M (17”)
*70/71
*72.7/73.9
22.5” (57.2cm)
12.87”(32.7cm)
16.7”(42.5cm)
L (19”)
*70/71
*72.8/74
23.3” (59.1cm)
12.87”(32.7cm)
16.7”(42.5cm)
XL (21”)
*70/71
*72.8/74
24” (61cm)
12.87”(32.7cm)
16.7”(42.5cm)
XXL (23”)
*70/71
*72.8/74
25.5” (64.8cm)
12.87”(32.7cm)
16.7”(42.5cm)
ZINN MEGABIKE SPECIFICATIONS (3” TRAVEL CROSS COUNTRY 29ER)
Frame Size
Head Angle
Seat Angle
Tub Tube
BB Height
Chainstay
XXL (23”)
*70.5/71.5
*72.8/73.9
25.5” (64.8 cm)
14” (35.6cm)
18” (45.7cm)
XXXL (25”)
*70.5/71.5
*72.8/73.9
26.1” (66.2cm)
14” (35.6cm)
18” (45.7cm)
Ø XC and Megabike models are lightweight cross-country racing frames with 3” travel. XC has 26-inch wheels and comes in smaller sizes; Megabike has 29-inch wheels and only comes in the biggest sizes.
Ø Frame includes rear shock (usually Fox Float RP3 ProPedal).
Ø * On XC and Megabike specs, the first listed head and seat angles are with a 100mm-travel fork, while the second (steeper) head and seat angles are with an 80mm-travel fork.
Ø ** Bottom bracket heights are measured with a 100mm fork installed; they will be about 8-9mm lower with an 80mm fork, depending on frame size.
Ø *** Top tube is measured horizontally (the effective top tube length), even though the top tube is both sloping and curved. (The actual center-to-center length of an upward-sloping top tube is less than its effective horizontal top tube length.)
Ø XC’s and Megabike's leverage ratio is 2 to 1
Ø Vertical rear wheel path
Ø Huge pivot centered at bottom bracket (uses BB shell as its shaft). Long-lasting, easily lubricated with a grease gun via grease fitting under BB shell housing.
Ø No chain kickback due to pivot location centered at bottom bracket.
Ø Sculpted Zinn monocoque down tube provides unprecedented head tube support.
ZINN ALL MOUNTAIN SPECIFICATIONS (5" TRAVEL)
SIZE
Head Angle
Seat Angle
Top Tube
BB Height
Chainstay
S (15”)
69.5
73.6
22.4” (56.8cm)
13.25” (33.7cm)
17” (43.2cm)
M (17”)
69.5
73.6
23” (58.4cm)
13.25” (33.7cm)
17” (43.2cm)
L (19”)
69.5
73.6
23.6” (60cm)
13.25” (33.7cm)
17” (43.2cm)
XL (21”)
69.5
73.6
24.3” (61.6cm)
13.25” (33.7cm)
17” (43.2cm)
XXL (23”)
69.5
73.7
25” (63.5cm)
13.25” (33.7cm)
17” (43.2cm)
ZINN GIGABIKE SPECIFICATIONS (5” TRAVEL ALL-MOUNTAIN 29ER)
SIZE
Head Angle
Seat Angle
Top Tube
BB Height
Chainstay
XXL (23”)
69
73
25” (63.5cm)
14.5” (36.8cm)
18.5” (47.0cm)
XXXL (25”)
69
73
26” (66.0cm)
14.5” (36.8cm)
18.5” (47.0cm)
Ø All Mountain model is heavier duty than the XC (and the Gigabike is heavier duty than the Megabike), with a big 5” of travel for all-mountain use.
Ø Frame includes rear shock (usually Fox RP3 ProPedal).
Ø Specifications assume a 125mm-travel fork with a through-axle front hub.
Ø All-Mountain’s leverage ratio is 3.33 to 1 for 26”-wheel models; 2 to 1 leverage ratio (and a longer shock) for the Gigabike (XXL and XXXL 29”-wheel models)
Ø Vertical rear wheel path
Ø Huge pivot centered at bottom bracket (uses BB shell as its shaft) on enormous needle bearings. Long-lasting, easily lubricated with a grease gun via grease fitting under BB shell housing.
Ø No chain kickback due to pivot location centered at bottom bracket.
Ø Sculpted Zinn monocoque down tube provides unprecedented head tube support.
If you are a tall rider, we specialize in building bikes for you.
To see a variety of frames built with components, please see our bike gallery. Custom Frames
You can also see available colors for Zinn Cycles Custom Frames.If you don't see a color you like, you can choose a color from our special order color chart for an extra $150.
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The replaceable dropouts are tough and stiff as well as lightweight.
We CNC-machine our own shock link as well as the precision pivots. Normally, we supply the bike with a Fox RP3 shock with a three-position ProPedal adjustment. Alternatively, both the DT SSD 210 shock (pictured) and the Fox Float RL shock perform great and have an easy-to-flip lockout lever.
The oversized pivot with large bearings around the bottom bracket shellcreates great stability and durability, while the pivot location eliminateschain kickback, no matter what gear you are in. A grease fitting underneaththe bottom bracket shell makes keeping the pivot bearings running smoothly a snap.
The entire Concentrak swingarm system provides great lateral stiffness, smooth vertical movement, long-wearing pivots, and no chain kickback. This system keeps your wheel on the ground grabbing traction when you want it, and it does so with a maximum of durability and a minimum of weight.
Zinn Megabike with 29" wheels and 3" of travel, size XXL, for a 6'5" rider
Custom Gigabike with 5" travel. Seat tube of a XXL and top tube of XXXL for 6'6" rider with long torso.
To see a variety of frames built with components, please see our bike gallery.
You can also see available colors for Zinn Cycles Custom Frames.If you don't see a color you like, you can choose a color from our special order color chart for an extra $150.
At Zinn Cycles, we will always give you an estimate of when your custom bike or cranks will be delivered. While we do our best to give an accurate ETA, it is still only an estimate. Custom bikes can take a long time to produce. There are a lot of factors that affect the building and delivery process of custom made products. We will do everything we can to deliver within our ETA, but it is not always possible. We strive to design and build the best quality custom cycling products for our customers, and we will do so even if it takes a really long time. I am certain that you will be happy with our products and it will be worth the wait.
