Specialized Stumpjumper ST Alloy 29 2020
2020 Mountain
Estimate price |
2,010$
Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Aluminum -
Wheels 29" -
Travel Front 130mm -
Travel Rear 120mm -
Fork RockShox Recon Silver RL
-
Groupset SX Eagle -
Suspension Full -
Drivetrain 1 × 12 -
Brakes Hydraulic Disc
Sizing
Recommended size guide.
SM
158cm - 171cm
MD
168cm - 180cm
LG
178cm - 189cm
XL
186cm - 199cm
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
M5 alloy chassis and rear end, asymmetrical design, 29 Trail Geometry, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 120mm of travel
Suspension Fork
RockShox Recon RL, Motion Control damper with low-speed compression to lockout, 51mm offset, rebound adjust, 15x110mm Boost™ Maxle® Lite thru-axle, 130mm of travel
Rear Shock
X-Fusion 02 Pro RL, Rx Trail Tune, rebound adjust, lockout 190x42.5mm
Drivetrain
Rear Derailleur
SRAM SX Eagle, 12-speed
Shift Levers
SRAM SX Eagle, trigger, 12-speed
Cassette
SRAM PG-1210 Eagle, 11-50t
Crank
SRAM SX Eagle, Powerspline, 170mm, Steel, 30T
Bottom Bracket
SRAM Powerspline
Chain
SRAM SX Eagle, 12-speed
Wheels
Front Hub
Specialized, sealed cartridge bearings, 15x110mm thru-axle, 32h
Rear Hub
Specialized, sealed cartridge bearings, 12x148mm thru-axle, 32h
Rims
Double-wall alloy, 27mm internal width
Spokes
Stainless, 14g
Tires
Eliminator, GRID TRAIL casing, GRIPTON® compound, 2Bliss Ready, 29x2.3"
Brakes
Brakes
Tektro Gemini Comp, hydraulic disc, resin pad, 200mm
Cockpit
Stem
Specialized, 3D-forged alloy, 4-bolt, 7-degree rise
Handlebar
Specialized Trail, 6061 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 31.8mm clamp, XS 720mm, S-XL 750mm,
Grips
Specialized Sip Grip, half-waffle, slip-on
Seat
Saddle
Body Geometry Myth 155 S, Body Geometry Henge 143 M/L/XL, steel rails
Seatpost
TransX dropper, 34.9mm, S: 125mm, M/L/XL: 150mm Travel
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | SM | MD | LG | XL |
|---|---|---|---|---|
| Stack Reach Ratio | 1.53 mm | 1.46 mm | 1.45 mm | 1.4 mm |
| Bottom Bracket Height | 341 mm | 341 mm | 341 mm | 341 mm |
| Front Center | 716 mm | 736 mm | 766 mm | 797 mm |
| Rake | 51 mm | 51 mm | 51 mm | 51 mm |
| Trail | 107 mm | 107 mm | 107 mm | 107 mm |
| Stack | 616 mm | 616 mm | 639 mm | 653 mm |
| Reach | 402 mm | 422 mm | 442 mm | 467 mm |
| Top Tube Length | 570 mm | 594 mm | 625 mm | 659 mm |
| Seat Tube Angle | 74.8 ° | 74.5 ° | 74.1 ° | 73.7 ° |
| Seat Tube Length | 380 mm | 410 mm | 455 mm | 505 mm |
| Head Tube Angle | 66.5 ° | 66.5 ° | 66.5 ° | 66.5 ° |
| Head Tube Length | 100 mm | 100 mm | 125 mm | 140 mm |
| Chainstay Length | 434 mm | 434 mm | 434 mm | 434 mm |
| Wheelbase | 1148 mm | 1168 mm | 1198 mm | 1229 mm |
| Bottom Bracket Drop | 33 mm | 33 mm | 33 mm | 33 mm |
| Standover Height | 753 mm | 759 mm | 772 mm | 773 mm |
| Wheels | 29" | 29" | 29" | 29" |
| Rider Min Height | 158 cm | 168 cm | 178 cm | 186 cm |
| Rider Max Height | 171 cm | 180 cm | 189 cm | 199 cm |
Model Overview
Stumpjumper ST Alloy 29 is part of the Specialized Stumpjumper model. Specialized launched 352 bikes of this model so far. Take a sneak peek at all Specialized Stumpjumper bikes models from 2020, by clicking here.
Model range prices
Specialized Stumpjumper ST Alloy 27.5 2020 is the most affordable bike of this model and has a price of 2010$. On the other hand, Specialized S-Works Stumpjumper SRAM AXS 29 2020, is the most expensive and costs 10520$.
Safety
Your safety is a top priority so always wear a helmet when you ride your bike. Moreover, wear the right clothing. You want to be visible to other drivers, so avoid wearing dark clothing.
Trail bikes average price
If you want to purchase a solid Trail bike, it is important to know that the average cost is 2762$. However, you could also get a good Trail bike even if you pay a lower amount than the average price. In conclusion, always check bike reviews and their components before making a purchase to make sure you don’t overpay.
When Specialized released this model in 2020, its price was 2010$. Comparing this to the average Trail bike price, we see that the price is 37.41% lower.
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.
Stumpjumper ST Alloy 29 components
Fork
The fork installed on this bike is the RockShox Recon Silver RL model. The travel on this model is 130mm. Bike forks absorb the shocks and give you a smooth and pleasant ride. To sum it all, when buying a bike, ensure that you look for a fork capable of decent travel.
Rear Shock
The Stumpjumper ST Alloy 29 has a rear shock with a travel of 120mm. The model X-Fusion 02 Pro RL is the one installed in this bike. 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, a full-suspension bike will give you the smoothest ride possible.
Wheels
The wheels on Stumpjumper ST Alloy 29 are the 29″ aluminum type. Having 29″ wheels means that you need less fork travel, leading to a reduction of the pedal bob effect. However, 29″ wheels will make your bike react slower to obstacles you may encounter.
Brakes
We ride faster and faster, so a good braking system is essential on a bike nowadays. The Stumpjumper ST Alloy 29 comes with Hydraulic Disc brakes. Hydraulic disc brakes provide amazing stopping power, no matter what the terrain. To sum up, these are ideal for anyone.
Sizes
There are 4 sizes available for this model. Rider height can be anywhere between 158 cm – 199 cm (5.18 ft – 6.53 ft). In short, it won’t be difficult to find the right one for you.
Dropper post
A dropper post is included with the Stumpjumper ST Alloy 29. 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.