Jamis HELIX A2 2021
2021 Mountain
Estimate price |
679$
Weight | 14.51 kg 
Bike details
Overview
Key information split into simple groups.
Bike summary
-
Category -
Frame Aluminum -
Wheels 27.5" -
Travel Front 100mm -
Fork SunTour
-
Groupset Tourney, Altus -
Suspension Hardtail -
Drivetrain 2 × 8 -
Brakes Hydraulic Disc
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
6061 aluminum main tubes, over-sized seat tube, zero-stack head tube, over-sized stays, replaceable derailleur hanger
Suspension Fork
SR Suntour XCE 28 DS 27.5”, coil spring, external preload adjustor, 28mm stanchions, aluminum lowers, 100mm travel
Drivetrain
Rear Derailleur
Shimano Tourney
Front Derailleur
Altus
Shift Levers
Shimano EF505, 2×8-speed
Cassette
Shimano HG31, 8-speed, 11-32T
Crank
Forged Alloy, 36/22T
Bottom Bracket
Sealed cartridge
Chain
KMC Z8.3, 8-speed
Pedals
MTB platform, hi-impact resin
Wheels
Rims
Alex TD26 27.5” double wall rims, 32H, alloy disc hubs, 14G black electroplated spokes
Tires
CST Patrol, 27.5 x 2.25”
Brakes
Brakes
Shimano MT200 hydraulic disc, Shimano RT26 160mm rotors
Cockpit
Stem
Jamis XC alloy threadless, 31.8 x 10 ? rise x 75mm (14”/16”), 90mm (18”)
Handlebar
Jamis XC alloy riser, 31.8 x 20mm rise x 680mm
Grips
Kraton
Headset
Zero-stack internal cup, 8mm cone spacer
Seat
Saddle
Jamis ATB Sport Women’s
Seatpost
Jamis alloy micro-adjust, 31.6 x 350mm (14”) 400mm (16”/18”)
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | 14" | 16" | 18" |
|---|---|---|---|
| Bottom Bracket Height | 309 mm | 309 mm | 309 mm |
| Front Center | 598 mm | 619 mm | 639 mm |
| Top Tube Length | 547 mm | 567 mm | 587 mm |
| Seat Tube Angle | 72.5 ° | 72.5 ° | 72.5 ° |
| Seat Tube Length | 356 mm | 406 mm | 457 mm |
| Head Tube Angle | 70 ° | 70 ° | 70 ° |
| Head Tube Length | 105 mm | 110 mm | 120 mm |
| Chainstay Length | 442 mm | 442 mm | 442 mm |
| Wheelbase | 1036 mm | 1057 mm | 1077 mm |
| Bottom Bracket Drop | 46 mm | 46 mm | 46 mm |
| Standover Height | 675 mm | 711 mm | 738 mm |
| Wheels | 27" | 27" | 27" |
Model Overview
HELIX A2 is a Jamis Helix model. Jamis launched 11 bikes of this model so far. You can get a glimpse at all models from 2021, by clicking on this link.
Model range prices
Jamis HELIX A2 2021 is the most economical model, with a starting price of 679$. Jamis HELIX A1 2021 on the other hand costs 779$, 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 Crosscountry bikes
According to our calculations, the average cost of a Crosscountry bike that is reliable is 1905$. However, this doesn’t mean that if you spend less money on a Crosscountry bike, you couldn’t get a decent one. In short, before purchasing your ideal bike do some research about its components, and also check for reviews online.
This bike was released in 2021 and its price was 679$. If we compare this with the average Crosscountry bike cost we notice that the price is 180.56% smaller.
Average weight for Crosscountry bikes
If we make a quick analysis of the average weight of a Crosscountry bike, we get 12.4 kg (27.34 lbs). A lighter bike will give you some extra advantage when climbing. A heavier bike will have more speed for descents.
Weighing 14.51 kg (31.99 lbs), the HELIX A2 model is much heavier than average. To sum up, it’s 17.02% heavier than the average weight of Crosscountry bikes.
Overview of components
Fork
The fork installed on this bike is the SunTour model. The travel on this model is 100mm. Bike forks absorb the shocks and give you a smooth and pleasant ride. To sum up, when buying a bicycle, make sure you get a fork that is capable of delivering decent travel.
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
When it comes to wheels, the HELIX A2 bike is equipped with the 27.5″ aluminum model. 27.5″ wheels are a mixture between 29″ wheels and 26″ wheels. However, the overall traction of 27.5″ wheels is lower than 29″ wheels.
Brakes
When you want to stop the bike in time, the brakes are vital. The HELIX A2 has Hydraulic Disc brakes. Hydraulic disc brakes provide amazing stopping power, no matter what the terrain. To sum up, your safety is in good hands.