About The Trek FX Sport SL 4 Carbon Shimano CUES Hybrid Bike

The Trek FX Sport SL 4 is the entry point into Trek's carbon flat-bar performance lineup. Built on a 400 Series OCLV Carbon frame and carbon fork, it targets riders who want road bike weight and responsiveness with the comfort and control of a flat handlebar. A 1x Shimano CUES U6000 10-speed drivetrain with a LINKGLIDE 11-48 cassette simplifies shifting without sacrificing range — one lever, one chainring, a wide cassette that handles climbs and fast flats with durability built for daily use.

Shimano hydraulic disc brakes (MT201 lever, UR300 caliper) with 160mm Shimano RT10 centerlock rotors provide predictable, low-effort stopping. Bontrager GR1 Expert Hard-Case Lite 700x40c tires on tubeless-ready Bontrager Paradigm rims (21mm internal width) balance flat resistance with comfortable rolling. DuoTrap S compatibility, 3-stop chain keeper, fender mounts, rack mounts, and top tube bag mounts make this a genuinely capable multi-use carbon bike. Bontrager City pedals included.

Who It's For

  • Cyclists who want a carbon fitness or commuter bike with 1x drivetrain and hydraulic disc

  • Riders who cover varied terrain — pavement and light gravel — and want a flat-bar platform for both

  • Road cyclists switching to flat bars for comfort or ergonomics without giving up performance

  • Step up to SL 5: if SRAM Apex 1x mechanical with 11-speed tighter gear steps is preferred over Shimano CUES 10-speed

What to Look For

  • 1x vs. 2x: Single chainring eliminates front shifting — simpler and lighter, but with wider gear steps; appropriate for mixed terrain, less ideal for very hilly routes

  • LINKGLIDE cassette: The 11-48 LINKGLIDE cassette delivers extended component life under variable real-world shifting

  • Fender and rack mounts: Present on the FX Sport SL 4; not all carbon flat-bar bikes offer this level of daily-use infrastructure

Key Features

Frame & Fork — 400 Series OCLV Carbon: Internal routing, 3-stop chain keeper, DuoTrap S compatible, fender mounts, flat mount disc, 135x5mm ThruSkew. Carbon fork with hidden fender mounts and 100x5mm ThruSkew.

Drivetrain — Shimano CUES U6000 10-speed 1x LINKGLIDE: U6000 shifter with optical gear display, U6000 GS rear derailleur. ProWheel 42T narrow-wide chainring at 170mm. CUES LG300 11-48 LINKGLIDE cassette. KMC X Glide chain.

Brakes — Shimano hydraulic disc: MT201 levers, UR300 calipers, 160mm Shimano RT10 centerlock rotors. Hydraulic disc with progressive modulation in all conditions.

Wheels & Tires — Bontrager Paradigm tubeless-ready: 32-hole, 21mm internal width, Presta valve. Bontrager GR1 Expert Hard-Case Lite 700x40c at 60 tpi — flat-resistant, comfortable on pavement and packed gravel.

Rider Intent Summary

  • Biggest strengths: 400 Series OCLV Carbon at entry SL price; Shimano hydraulic disc; 1x LINKGLIDE durability; fender and rack mounts; tubeless-ready wheels; pedals included

  • Tradeoffs: 1x has wider gear steps than 2x; CUES is durable but not a performance groupset; 135x5mm ThruSkew limits wheel upgrade paths

  • What makes it different: The most practically equipped carbon flat-bar bike in the FX Sport line — fender mounts, rack mounts, LINKGLIDE durability, and hydraulic disc under $2,000

Victory's Take

At Victory Bicycle Studio, the FX Sport SL 4 is the carbon fitness bike we recommend when a rider wants low maintenance, mixed-terrain capability, and flat-bar comfort in a carbon package. The LINKGLIDE drivetrain is a practical feature that matters more over time than it sounds on a spec sheet.

What you get

  • Frame - 400 series OCLV Carbon
  • Fork - Carbon, hidden fender mounts, flat mount disc, 100x5mm thru-skew
  • Component Groupset - Shimano Cues 10-Speed
  • Wheels - Bontrager Paradigm TLR Aluminum Wheelset
FX SPORT SL 4 SO S Matte Deep Smoke

Trek

Trek FX Sport SL 4 Carbon Shimano CUES Hybrid Bike

Regular price $1,999.99 USD
Sale price $1,999.99 USD Regular price $1,999.99 USD

Specifications

Frameset
Frame

400 series OCLV Carbon, internal routing, 3s chain keeper, DuoTrap S compatible, fender mounts, flat mount disc, 135x5mm ThruSkew

Fork

Carbon, hidden fender mounts, flat mount disc, 100x5mm thru-skew

Wheels
Front Hub

Formula, CL-51 alloy, 100x5mm

Front Skewer

135x5mm bolt-on

Rear Hub

Formula, CL-52 alloy, 135x5mm

Rear Skewer

169x5mm bolt-on

Rim

Bontrager Paradigm, Tubeless Ready, 32-hole, 21mm width, Presta valve

Spokes

14g stainless steel, black

Tire

Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700x40c

Max Tire Size

42mm without fenders, 40mm with fenders

Drivetrain and Brakes
Shifter

Shimano CUES U6000 w/optical gear display, 10-speed

Rear Derailleur

Shimano CUES U6000 GS

Crankset

Prowheel alloy, 42T narrow-wide ring

- Size XS, S: 170mm

- Size M, L, XL: 175mm

Cassette

Shimano CUES LG300, LINKGLIDE, 11-48, 10-speed

Pedals

Bontrager City

Max Chainring Size

1x: 44T

Brakes

Shimano hydraulic disc, MT201 lever, UR300 caliper

Brake Rotors

Shimano RT10, centerlock, 160mm

Max Rotor Size

160mm front & rear

Cockpit
Seat Post

Bontrager alloy, 27.2mm, 12mm offset, 330mm

Handlebars

Bontrager, alloy, 31.8mm, 15mm rise

- Size XS, S: 600mm width

- Size M, L, XL: 660mm width

Stem

Bontrager Elite, 31.8mm, Blendr compatible, 7 degree

- Size XS: 90mm

- Size S, M: 100mm

- Size L, XL: 110mm

Additional Information
Weight

M, 10.50 kg, 23.15 lbs

Weight limit

300 lbs (136 kg)

**Specifications subject to change without notice

Frequently Asked Questions

How is the bike packaged and how long does delivery take?

All bikes are securely packaged to ensure that damage doesn't occur during shipping. All parts of the bike are padded and if needed, zip tied to minimize or eliminate movement inside the box. Once a bike is handed to the shipping company (usually Fedex or UPS), depending on your location, delivery will range from 1 day to 8 days. If you do choose the option for Professional Assembly or White Glove Delivery, this can add anywhere from 2 days to 5 days to the lead time.

Can I finance the purchase of my new bike?

Yes.  Simply select the Shop Pay Installments option which will allow you to buy now and pay later.  Shop Pay Installments is powered by Affirm.  If you would like to determine your spending limit, simply download the Shop app or the Affirm app on your smartphone and after you create an account on one of these apps, the app will let you know what is your spending limit.

Can I return the bike if it doesn't suit my needs?

Our return process is as follows. The customer is responsible for the return label ($150). Once the returned bike arrives at our warehouse, our team will inspect it and make sure it is in new condition and undamaged. Once we verify, we will process the return and issue a refund to the original payment method on file. To clarify the amount refunded, it would just be the amount of the bike (and tax if applicable) less the $150 shipping label that we provided, but the original shipping is not refunded. So if the original bike cost $4,500 and shipping was $150 (so you paid $4,650), you would be refunded $4,350 (the $4,500 less $150 for the return label) assuming the bike was returned in new and un-used condition and within the 30 day return period.

What does the warranty of my new bike or product cover and what is the warranty period?

Depending on the bike or any product, different companies have different warranty policies.  If you do ever have an issue with your bike or any product, simply email us at online@victorybicyclestudio.com and we will assist with any warranty issues and clarify the warranty for the affected product.

Can I have my bike serviced at any bike shop?

Typically, to avoid any issues with your warranty, you should bring your bike to a certified mechanic or bike store for that bike (i.e. if you have a Trek bicycle, you should bring the bike to be serviced to a local bike store that is an authorized Trek dealer).  If you need assistance, simply email us at online@victorybicyclestudio.com and we can direct you to a certified dealer of your bike.

Do you ship bikes internationally?

We unfortunately do not ship bikes outside of the 48 contiguous states of the United States. We do recommend for international customers to open (or use a current account) account with a freight forwarding company. If you use a freight forwarding company located in the U.S., make sure to put your billing address for a dedicated credit card as the same address as the freight forwarder so that you don't have any credit card or payment method issues).

Once you do this, simply place an order with us and we can ship to the U.S. address as long as the credit card doesn't get rejected. Once the freight forwarder has the box/order/shipment, you would instruct them to then ship to you in your home country and they would charge you their own shipping charge to ship to your international address.

Do you offer free shipping?

We do offer free shipping on non-bike orders over $100. We do not offer free shipping for bicycles unless it is a one time promotion. Generally, bike shipping will cost $150 and that covers just the shipping of the bike with no assembly. If you were to bring that bike to your local mechanic or bike store, you would pay them their assembly fee. If you choose our Professional Assembly option for $200, our service technicians would assemble the bike before shipping and then re-pack the bike safely for transit. When you receive the bike you would attach the front wheel, attach the seatpost/saddle, and raise the handlebars and clamp them. Those three items do have to be detached to minimize or eliminate the chance of damage in transit.

How much does shipping cost?

For orders of parts, accessories, apparel, etc. on orders under $100, shipping is a flat rate of $9.99. Regular bike shipping without assembly is $150, bike shipping with Professional Assembly is an additional $200 (so $350 in total which includes the $150 of regular shipping). Our White Glove Delivery option is $699 and that will cover the assembly of the bike and our White Glove Delivery partner delivering your dream bike to your front door, ready to ride!

How can I track my order?

When you place your online order, you will receive an instantaneous email update with your order number and order details, and shortly after, you will receive a follow up order email with the tracking number for your order.  If you still need assistance with your order, feel free to email us at online@victorybicyclestudio.com and we will respond asap.

What happens if my package arrives damaged?

If your package arrives damaged, email online@victorybicyclestudio.com with pictures of all angles of the box and pictures of the damaged product and we will work with you to either send a new replacement asap and coordinate return (or re-imburse you for labor or costs incurred to fix the issue at your local bike store).

Are pedals included with the bike?

If you do not see pedals in the bullet point product specs on the product page, the bike does not come equipped with pedals.  Many manufacturers do not spec bikes with pedals, so they are often purchased separately.

If I only pay the $150 for bike shipping, can I assemble the bike on my own?

Victory Bicycle Studio highly recommends that you bring your bike to your local certified bike store for the brand of the bike that you purchased. If you do attempt to assemble the bike and damage occurs, this may result in your warranty not being honored. For that reason, we do highly recommend to select our Professional Assembly option for $299.