Jamis PORTAL A1 2020
2020 Mountain
Estimate price |
3,999$
Weight | 14.29 kg 
Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Aluminum -
Wheels 29" -
Travel Front 130mm -
Travel Rear 130mm -
Fork Fox Rhythm Float 34
-
Groupset XT, Race Face -
Suspension Full -
Drivetrain 1 × 12 -
Brakes Hydraulic Disc
Sizing
Recommended size guide.
XS
156cm - 166cm
SM
163cm - 174cm
MD
171cm - 182cm
LG
179cm - 189cm
XL
185cm - 195cm
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Triple-butted 6061 aluminum, 130mm travel 3VO suspension, Enduro® Max sealed bearing pivots, 1.5 - 1 1/8” tapered head tube, 12x148mm thru-axle, Internal dropper post routing, Custom Jamis upper chainguide mounts, ISCG05 lower chainguide mounts, Fox Float DPS Performance Series EVOL shock w/3-position compression, 10mm hardware, replaceable derailleur hanger
Suspension Fork
Fox Rhythm 34 Float 29" w/ sweep adjust compression & lock-out,15x110mm axle, air spring compression, rebound adjust, tapered alloy steerer, 130mm travel
Drivetrain
Rear Derailleur
Shimano XT, 12-speed
Shift Levers
Shimano XT, 1x12-speed
Cassette
Shimano XT M8100, 12-speed, 10-51T
Crank
Race Face Aeffect, 32T
Bottom Bracket
Race Face BSA
Chain
KMC X12, 12-speed
Pedals
N/A
Wheels
Rims
DT Swiss M1900 SPLINE 25 29" tubeless wheels, DT 370 hubs, DT Champion spokes
Tires
Vittoria Martello 29 x 2.35", TNT tubeless
Brakes
Brakes
Shimano XT M8100 Ice-Tech hydraulic disc, RT-800 180mm front & 160mm rear centerlock rotors
Cockpit
Stem
Race Face Aeffect R, 50mm extension, 35mm clamp diameter
Handlebar
Race Face Aeffect R, 780mm x 20mm rise, 35mm diameter
Grips
Jamis Lock-On
Headset
FSA Orbit IS Integrated, 8mm cone spacer
Seat
Saddle
WTB Volt
Seatpost
KS Rage Dropper, Southpaw remote
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | XS | SM | MD | LG | XL |
|---|---|---|---|---|---|
| Stack Reach Ratio | 1.504 mm | 1.45 mm | 1.401 mm | 1.356 mm | 1.315 mm |
| Bottom Bracket Height | 348 mm | 348 mm | 348 mm | 348 mm | 348 mm |
| Front Center | 686 mm | 712 mm | 737 mm | 762 mm | 788 mm |
| Rake | 48 mm | 49 mm | 50 mm | 49 mm | 50 mm |
| Trail | 103 mm | 102 mm | 101 mm | 102 mm | 101 mm |
| Stack | 597 mm | 606 mm | 615 mm | 625 mm | 634 mm |
| Reach | 397 mm | 418 mm | 439 mm | 461 mm | 482 mm |
| Top Tube Length | 560 mm | 585 mm | 610 mm | 635 mm | 660 mm |
| Seat Tube Angle | 74.5 ° | 74.5 ° | 74.5 ° | 74.5 ° | 74.5 ° |
| Head Tube Angle | 67.5 ° | 67.5 ° | 67.5 ° | 67.5 ° | 67.5 ° |
| Head Tube Length | 95 mm | 105 mm | 115 mm | 125 mm | 135 mm |
| Chainstay Length | 437 mm | 437 mm | 437 mm | 437 mm | 437 mm |
| Wheelbase | 1122 mm | 1148 mm | 1173 mm | 1198 mm | 1224 mm |
| Bottom Bracket Drop | 26 mm | 26 mm | 26 mm | 26 mm | 26 mm |
| Standover Height | 738 mm | 761 mm | 756 mm | 761 mm | 781 mm |
| Wheels | 29" | 29" | 29" | 29" | 29" |
| Rider Min Height | 156 cm | 163 cm | 171 cm | 179 cm | 185 cm |
| Rider Max Height | 166 cm | 174 cm | 182 cm | 189 cm | 195 cm |
About this model
PORTAL A1 is part of the Jamis Portal model. Jamis launched 30 bikes of this model so far. Take a sneak peek at all Jamis Portal bikes models from 2020, by clicking here.
Model range prices
Jamis PORTAL A2 2020 is the cheapest bike model and costs 2999$. Jamis PORTAL C1 2020 is the most expensive one and costs 8499$.
Safety
When cycling always take safety very seriously. Wear a helmet, obey the traffic rules and wear hi-vis clothes. In short, take care of yourself so others can take care of you.
Trail bikes average price
If you want to purchase a solid Trail bike, it is important to know that the average cost is 2762$. However, even though the average price of a Trail bike is lower, you might still be able to get a top-quality bike. To make sure you don’t pay a higher amount than normal for your bike, always do some components analysis and read reviews.
When Jamis released this model in 2020, its price was 3999$. Comparing this to the average Trail bike price, we see that the price is 44.79% more expensive.
Average weight for Trail bikes
Trail bikes have an average weight of 12.98 kg (28.62 lbs). A lighter bike will give you some extra advantage when climbing. A heavier bike will have more speed for descents.
PORTAL A1 weighs 14.29 kg (31.5 lbs) and is considerably heavier than the average. To sum up, it’s 10.09% heavier than the average weight of Trail bikes.
Internal Cable Routing
Another thing to mention, is the internal cable routing of this bike. In conclusion, this helps you too, keep the bike cables in mint condition, and also it looks better. No more cables, surrounding the bike.
PORTAL A1 components
Fork
The PORTAL A1 comes factory-installed with the Fox Rhythm Float 34 fork. This has a travel range of 130mm. Bike forks are perfect to absorb shocks and provide a great riding experience overall. In short, you should always ensure you have a good fork when purchasing a bike.
Fork material
The fork on this bike is made out of aluminum, which doesn’t add too much extra weight to the bike. However, it is not so stiff as steel or carbon forks are.
Rear Shock
Rear shocks give you increased comfort, control, and traction, which is important when cornering or braking. This allows you to ride faster on bumpy roads. In short, if you want smooth rides, get a full-suspension bicycle.
Wheels size
When leaving the production line, the PORTAL A1 model has 29″ aluminum wheels. These wheels are more forgiving when you go over roots, rocks, bumps, or other obstacles you encounter on your ride. However, if you’re not a tall person, you might find it difficult to adapt to this wheel size.
Brakes
Nothing is more important on a bike than its ability to brake properly. Jamis PORTAL A1 is equipped with Hydraulic Disc brakes. Hydraulic disc brakes are perfect for mountain biking, road cycling, and commuting. To sum up, you can ride your bike with confidence.
Sizes
PORTAL A1 comes in 5 sizes, that range from 156 cm – 195 cm (5.12 ft – 6.4 ft). In conclusion, you won’t have a problem finding one that suits you.
Dropper post
Every bike should have a dropper post, and this one does. A dropper post is a must-have these days if you’re riding anything remotely technical. The main benefit of a dropper post is increased safety while riding. As mentioned above, the lever system allows you to quickly move the saddle out of the way when approaching descents or trail obstacles.