Jamis DXT A3 Step-Over Frame 2021
2021 Urban
Estimate price |
639$
Weight | 14.4 kg 
Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Aluminum -
Wheels 700c -
Travel Front 75mm -
Fork SunTour
-
Groupset Tourney, Shimano -
Suspension Hardtail -
Drivetrain 3 × 7 -
Brakes Mechanical Disc
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Size Specific Design 6061 aluminum with fast back rear triangle, 1 1/8” head tube, internal cable routing, chain stays disc brake mounts, 34.9mm seat tube, kickstand mount, replaceable derailleur hanger, fender/rack eyelets and ring lock mount eyelets.
Suspension Fork
SR/Suntour NVX-DS, aluminum lowers, coil spring, 28mm stanchions, 1-1/8” steerer, 75mm travel
Drivetrain
Rear Derailleur
Shimano TY300
Front Derailleur
TY510 top swing
Shift Levers
Shimano Rapid Fire SL-EF500, 2-speed
Cassette
Shimano CS-HG200, 7-speed, 12-32T
Crank
Forged alloy crank with chain guard, 48/38/28T, 170mm
Bottom Bracket
VP sealed cartridge, 68 x 122.5mm
Chain
KMC Z7
Pedals
Platform style
Wheels
Rims
Alex TD26 disc specific double wall alloy rims, 32H, alloy disc hubs with QR and 14g black electroplated spokes
Tires
CST Dual Sport Tire, 700 x 42c
Brakes
Brakes
Tektro MD-280 cable-actuated disc brakes with 160mm stainless 6-bolt rotors and Shimano EF41 levers
Cockpit
Stem
Jamis Trekking, 3D forged alloy, 15 ? rise, Length-60mm
Handlebar
Jamis Riser bar, double-butted aluminum, 25.4 x 10 ? sweep x 20mm rise x 640mm (14-18”), 660mm (20”)
Grips
ERGO Type Grip
Headset
Internal Cup, threadless, 1 1/8”
Seat
Saddle
NEW Jamis Touring Women’s with SL cover
Seatpost
Jamis alloy micro-adjust, 31.6 x 350mm alloy clamp with QR seatpin
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | 14" | 18" | 20" |
|---|---|---|---|
| Stack Reach Ratio | 1.67 mm | 1.67 mm | 1.68 mm |
| Front Center | 624 mm | 624 mm | 620 mm |
| Rake | 40 mm | 40 mm | 40 mm |
| Trail | 90 mm | 88 mm | 81 mm |
| Stack | 639 mm | 647 mm | 655 mm |
| Reach | 383 mm | 387 mm | 391 mm |
| Top Tube Length | 564 mm | 564 mm | 577 mm |
| Seat Tube Angle | 73.5 ° | 74 ° | 73.5 ° |
| Seat Tube Length | 356 mm | 457 mm | 508 mm |
| Head Tube Angle | 70 ° | 70.5 ° | 71.5 ° |
| Head Tube Length | 125 mm | 131 mm | 135 mm |
| Chainstay Length | 447 mm | 447 mm | 447 mm |
| Wheelbase | 1064 mm | 1064 mm | 1060 mm |
| Bottom Bracket Drop | 60 mm | 60 mm | 60 mm |
| Standover Height | 648 mm | 671 mm | 669 mm |
| Wheels | 700 | 700 | 700 |
Model Overview
DXT A3 Step-Over Frame is a Jamis Dxt model. 33 bikes variations carry this model name so far. You can easily view all of the Jamis Dxt bikes models from 2021, here.
Model range prices
Jamis DXT A3 STEP-OVER 2021 is the most economical model, with a starting price of 599$. Jamis DXT A1 2021 on the other hand costs 979$, and is the most expensive model.
Safety
When you go for a ride, don’t forget to put your helmet on. Moreover, ride with traffic, not against it. This will help you stay visible to drivers and also makes it easier for them to see you.
Average price for Fitness bikes
According to our calculations, the average cost of a Fitness bike that is reliable is 656$. However, you could also get a good Fitness bike even if you pay a lower amount than the average price. To sum up, when you purchase your bike, make sure to check if it has reviews, and also do some components research.
Furthermore, if we have a quick look at this model’s cost, we can see that at its release date the price was 639$. If we compare this with the average Fitness bike cost we notice that the price is 2.66% lower.
Average weight for Fitness bikes
On a deeper look, we notice that the average weight of a Fitness bike is 11.24 kg (24.78 lbs). A lighter bike will give you some extra advantage when climbing. A heavier bike will have more speed for descents.
With a weight of 14.4 kg (31.75 lbs), Jamis bike is much heavier than average. In conclusion, the average Fitness bike weighs 28.11% less than DXT A3 Step-Over Frame.
Internal Cable Routing
Moreover, this bike comes with internal cable routing allowing you to keep the cables in a good condition. It also makes it look more professional.
Overview of components
Fork
The SunTour is included from the factory. It has a travel distance of 75mm. Bike forks are great for shock absorption and provide you with a smooth ride. In conclusion, always look for a fork with decent travel when you buy a bike.
Fork material
The fork on this bike is made out of aluminum, which is a lighter material. However, it is not as tough, nor durable as steel is.
Wheels size
The wheels on DXT A3 Step-Over Frame are the 700c aluminum type. These wheels are the most used kind for road bikes in general. However, while they give you great speed and control, these wheels are not so bump-friendly.
Brakes
Stopping the bike when needed, it’s essential for your safety. This bike has Mechanical Disc brakes. They are much easier to maintain than hydraulic disk brakes. However, with hydraulic disk brakes, you have the ultimate braking power!