2019 Polygon Strattos S4 Shimano Tiagra Road Bike

WAS $1,049.00 You Save $50.00

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From riding with your friends, going on day-long adventures, or participating in a gran-fondo, the Polygon Strattos S4 has you covered. Take your riding to the next level with a true road bike. Built around a hydroformed aluminium frame, carbon fibre fork, and 10-speed Shimano Tiagra groupset, the Strattos S4 will make you fall in love with the sport of road cycling.

The Strattos frame is made of Polygon's new ALX Performance 6061 Hydroformed Aluminium which is now only 1.3kg (350 grams lighter than last years Strattos frame) and has been designed for improved bump absorption and vibration compliance. Also, used in high-performance cars, hydroforming injects fluid into a cylindrical frame tube to manipulate into a more beneficial shape which allows Polygon to reduce weight and increase stiffness in the key areas of the frame to improve ride quality. The frame is constructed with super smooth, double welded joints. The first weld is used for strength, then using a die grinder it is ground back to which a second weld is added to fill in any gaps. Lastly, the final grind and polish are applied, to give the frame joints an almost carbon like appearance. Not only does this frame look like carbon and ride like carbon, it still also provides the incredible value of aluminium. 

The bike features Shimano Tiagra 20 speed groupset. For years it has played second fiddle to the popular Shimano 105. However with the latest update, its worth looking very closely at the groupsets, as you’ll notice only one difference. Shimano 105 has 11 speeds, Shimano Tiagra has 10. All other components are extremely similar in weight, performance, durability and riding feel. If you've been told that your new bike needs to have at the very least Shimano 105 gears, that's because whomever told you that never tried Shimano Tiagra 4700. The groupset features fully integrated shifters and brakes, internal brake and gear cables, same ergonomics and even the same gear range as top tier Shimano groupsets – the only difference being you are missing out on one less cadence option. With all this considered you might be hard pressed to justify anything else.

The wheelset on the Strattos S4 is the new Entity clincher which is now tubeless ready. The wheels feature sealed bearings, semi aero rims with 30mm profile, 28 spokes front and back, oversized freehub engagement pawls and a machined alloy brake surface. This results in a wheel that exudes quality. The Entity clincher is one of the lightest wheelsets in its category which has allowed it to keep rotational mass as low as possible, improving acceleration and handling. Matching these wheels are Schwalbe Lugano 25c tyres keeping the Strattos S4 rubber side down at all times, with plenty of grip on dry and wet roads plus Schwalbe’s Active Guard adds puncture protection so you can rest assured the tyres are going to handle the roughest of road terrain.

Key Features:

  • ALX Advance Endurance Alloy Frame
  • ACX Advance Endurance Carbon Fork with Tapered Carbon steerer
  • Full Shimano Tiagra 4700 groupset 20 Speed
  • Shimano Integrated bottom bracket
  • Entity Clincher wheelset (tubeless ready)
  • Schwalbe Lugano 700x25C
  • Weight = 9.6kg (53cm frame)
  • LIFETIME Warranty on frame
  • Full manufacturer’s warranty on parts 


Model Comparison Chart


Strattos S2

Strattos S3

Strattos S4

Strattos S5

Strattos S7

Forks Light Weight Carbon with Carbon Standard Steerer Light Weight Carbon with Carbon Standard Steerer ACX Performance road Carbon Taper Steerer ACX Performance road Carbon Taper Steerer ACX Endurance road Carbon Taper Steerer
Frame ALX Advance Endurance Alloy ALX Advance Endurance Alloy ALX Advance Endurance Alloy ALX Performance Alloy ACX Endurance Carbon Frame
Weight 10.7kg 9.9kg 9.6kg 8.95kg 7.9kg
Drivetrain Shimano Claris Shimano Sora Shimano Tiagra Shimano 105 Shimano 105
Speed 16 Speed 18 Speed 20 Speed 22 Speed 22 Speed
Brakes Alloy Brake Caliper Tektro R312 Shimano Tiagra BR-4700 Shimano 105 BR-R7000 Shimano 105 BR-R7000
Wheelset Araya AR-713 Rims with Alloy hubs Araya SA-730 Rims with Alloy hubs Entity XL2, 28H Entity XL2, 28H, Sealed Bearing Hubs Entity XL3, 20H, Sealed Bearing Hubs
Price $699 $849 $1,049 $1,299 $1,699
Extras         no pedals


Polygon Strattos S4

Trek Emonda ALR 4 (2019)



ALX Performance Alloy Frame

300 Series Alpha Aluminium



ACX Performance Carbon Fork with Tapered Carbon Steerer

Émonda carbon, E2 tapered steerer



Entity Sport, Alloy, 400mm (48-51) 420mm (54-60)

Bontrager Comp, Alloy 31.8mm



Entity Sport, Alloy, 90mm (48-51) 110mm (54-60)

Bontrager Elite, Alloy 31.8mm



FSA No. 42/ABC Tapered (42/52mm)

Integrated, cartridge bearing, sealed, 1-1/8" top, 1.5" bottom



Entity Aion Saddle

Bontrager Montrose Comp



Entity Sport, Alloy, 27.2x350mm

Bontrager alloy



Shimano Tiagra FC-4700 50/34

Shimano Tiagra, 50/34 (compact)



Shimano Integrated BB

Press Fit

Polygon better


KMC X-10

Shimano Tiagra

Trek better


Shimano Tiagra, 12-28T

Shimano Tiagra 12x28T



Shimano Tiagra FD-4700

Shimano Tiagra



Shimano Tiagra RD-4700SS

Shimano Tiagra



Shimano Tiagra ST-4700

Shimano Tiagra



Shimano Tiagra ST-4700

Shimano Tiagra



Shimano Tiagra BR-4700

Shimano Tiagra



Alloy flat cage


Polygon better


Schwalbe Lugano 700x25C

Bontrager R1 Hard-Case Lite, 700x25c



Entity Tubeless Ready Rims with Alloy Hubs

Bontrager Affinity, Tubeless Ready, alloy hubs



Yes (some regional and remote postcodes excluded)


Polygon Better



$1,499 (Source: Trek Aust Oct 2018)

$450 difference

Size Chart






RIDER HEIGHT 160-170cm 165-175cm 170-180cm 175-185cm 180-190cm
SEAT TUBE LENGTH 48cm 51cm 54cm 57cm 60cm


Note: If you are in between sizes, measure your wingspan. If it is greater than your height, go for the frame size up. If your height is greater than your wingspan, go for a frame size down.





Size Seat Tube Length Seat Tube Angle Effective Seat Tube Angle Head Tube Length Head Tube Angle Effective Top Tube BB Height BB Offset Chainstay Length Wheelbase Frame Reach Frame Stack Standover Height
48 475 74.5 74.5 105 72.5 525 267 72.5 DROP 405 965.1 383.5 510.7 743.6
51 500 74 74 130 73 540 269.5 70 DROP 408 975.7 386.9 533.9 770
54 525 73.5 73.5 155 73 555 269.5 70 DROP 408 985.8 389.8 557.6 797.3
57 555 73 73 185 73 570 272 67.5 410 998.7 391.5 583.5 828.5
60 585 73 73 215 73 590 272 67.5 410 1018.7 402.8 611.9 857.9

We understand how important shipping is once you click "buy now", that's why we have the following policies

Australian Warehouse

All products are in stock and ready to ship from our Sydney warehouse (with the exception of preordered bikes, which have the dispatch date illustrated)

Next day dispatch

All orders received by 5 pm AEST will usually be dispatched the following business day. If an order is placed on the weekend or public holiday, please note dispatch will usually be the next working day. For tracked shipments, please allow 12 hours for tracking to begin.

Shipping of Parts, Accessories and Apparel

Economy Shipping

There is free delivery available on all small parcels Australia wide using tracked services of Australia Post or Fastway, no minimum order value required! Estimated delivery time is 4-9 business days. 

Express Shipping

We do also offer Express Shipping for a small additional fee on parts, accessories and apparel orders. Estimated delivery time on Express Shipping is 1 to 4 business days.

Shipping of Bikes

Shipping of bikes and other bulky goods is free to 85% of residences in Australia. However, some postcodes incur a surcharge starting from $29. 

Once shipped you will be issued a consignment number which can be used to track your parcel. We use Direct Freight Express for deliveries and you can track your delivery by calling 1300 347 397 or online at www.directfreight.com.au


We’re so confident that you’ll love our extensive range of bikes, that we’ll let you ride one as your own for a full 14 days and if you don’t like it, simply e-mail us at sales@bicyclesonline.com.au and we’ll pick it up from you, free of charge! Just make sure you keep the box so it can be re-used to send it back. Click here for more information. 

All of our bicycles come with a Free Pro Build valued at $99. This means that your bicycle will be pre built by our professional mechanics. For your convenience, safety and comfort all our bikes are fully assembled prior to delivery. The bike is then packaged back into a box for secure shipment.


When your bike arrives, all you have to attach is the front wheel, the handlebar and pedals, everything else has been done – the headset has been adjusted, wheels trued, pedals and seat post greased, brakes and gears calibrated, and the tyres have been pumped up (please note upon arrival, in some cases you may need to add more air to tyres).

Most companies simply sell you the bike as it comes from the factory, which will require significant know-how to get your bike on the road. Currently we are the only Australian company providing this service, and have the 14 day test ride to back it up.

All the tools required to assemble the bike are included. 

Please note, that all bicycles whether purchased online or instore, are mechanical devices and need to be serviced regularly to ensure proper functioning. New gear and brake cables, will stretch during the initial bed-in period, and will need to be adjusted after approximately 150-300km. 

Whilst your new bicycle will have already gone through our Pro Build process, you will still need to complete some minor final assembly steps when you take your bicycle out of its box.

Please follow the video playlist below to correctly complete the setup of your new bike:


Assembly Time:

  • 10-15min - You have assembled bikes before
  • 15-25min - You are mechanically handy
  • 30-40min - Never assembled a bike and working with tools isn't your thing


Unboxing your bike:

Start by carefully opening the top flap to expose the contents. You will see the bike with plenty of protective packaging and next to the rear wheel, the saddle & seatpost, a small cardboard box where your pedals, tools, bell and reflectors are. If you ordered any other products with the bike, it is likely they were placed on the bottom of the box as well. Remove all the loose items before pulling the bike out of the box and gently placing it on the floor.

Keep the box and all the protective packaging found on the bike in case you choose to change frame sizes, upgrade/downgrade the bike, or return the bike for a full refund under the 14 Day Test Ride Policy.


How to install a quick release front wheel:



Road brake setup:



How to Install Handlebars and faceplate:


How to install pedals on your bike:


Congratulations on your Purchase

This bicycle is backed by a LIFETIME factory warranty on frame and full manufacturer’s warranty on parts. Lifetime warranty refers to the lifetime of the original owner.

Warranty is valid only for bicycle that has been properly and well-maintained under the following conditions:

Warranty includes:

  • All damaged or fractured or broken frame / fork / component which was caused by manufacturing or assembling error in factory.
  • Non functioning mechanism caused by manufacturing error in factory.

Warranty is NOT valid for:

  • Incorrect assembly, i.e pedals installed in the wrong crank arm. 
  • Normal degradation caused by frequent use, such as degrading brake shoe, deflated tire, etc
  • Surface defects, such as stained, marred, defaced, etc
  • Damaged caused by misuse or accident
  • Other damages which are not caused by factory error
  • Bicycle which has been sold to other party
  • Bicycle used in commercial, such as rented
  • Bicycle which has not been well-maintained

For any damages which is guaranteed by the brand as the first condition above, the brand will repair or replace damaged frame / fork / component with the one of the same brand or similar.

Warranty is valid for all Polygon and Marin bicycles to the original owner only, by showing the purchase invoice.  

To make a claim click here.

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