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MY23 Domane+ SLR FAQ

What’s different about the frame compared to previous versions?

A TQ e-bike system makes Domane+ SLR look, sound, fit, and feel like a road bike. Domane+ SLR 6 comes with the TQ HPR50 motor, and Domane+ SLR 7 and 9 come with the HPR60 motor.

What is the geometry?

Domane SLR+ uses Endurance Geometry. Compared to the H1.5 geometry found on Madone and Émonda, Endurance Geometry features a taller head tube and longer wheelbase to maximize comfort and stability.

What is the maximum tire size?

Recommended tire clearance standards for this model have changed. Accurate values can be found in specs on each bike model page.

What is the maximum rotor size?

Front: 180mm (min 160mm)
Rear: 160mm (min 140mm)

What chainrings can I use?

SRAM: X-SYNC 1x in sizes 36T to 46T (107 BCD). Praxis 107 BCD spider.
Shimano: Praxis chainrings available in sizes 48/36, 50/34, and 52/36

What is the hub spacing?

100x12mm front, 142x12mm rear.

What’s the Q-factor?

163mm

Are these bikes tubeless compatible?

Yes – all Domane+ SLR come with tubeless ready wheels, tires, valves, and TLR sealant.

Does it have any accessory mounts (kickstand, racks, fenders, lights)?

Domane+ SLR has hidden fender mounts to be used with SKU W331954 and the RCS Pro stem is Blendr-compatible.

Is it compatible with mechanical drivetrains?

No, electronic drivetrains only.

How do I adjust the seatpost height?

Remove the magnetically attached IsoSpeed assembly cover using your hands. Loosen the exposed M6 bolt, adjust the seatpost to your desired height, torque the M6 bolt to 5.2Nm, reinstall IsoSpeed assembly cover.

What’s that security bolt on the bottom of the top tube for?

That bolt is only removed when full IsoSpeed service is performed. IsoSpeed is not adjustable.

Does the frame have an internal storage compartment like Domane SLR/SL?

No.

What do I need to know about the RCS Pro stem?

The RCS Pro is an all-new, integrated stem that shares compatibility across several different road models. It keeps the cables tucked out of sight while also allowing riders to swap stem sizes without having to remove any brake hoses or shift housings. RCS Pro is available in both -7 and +7 degree rise.

Is it compatible with the Madone SLR bar/stem?

No.

Does Domane+ SLR have top tube bag mounts like the acoustic version?

No – the spot where a top tube bag would go is used by the TQ display. There are no hard mounts for bags on Domane+ SLR.

Is the front derailleur hanger removable?

No.

Why are the chainstays 10mm longer on Domane+ SLR compared to the standard Domane SLR?

We lengthened the chainstays to make room for the TQ motor housing.

How does the TQ Harmonic Pin Ring motor function differently from other e-bike motors?

Most other e-bike motors use gears and belts to transmit power. These parts take up more space and can make noise or break. The TQ HPR50 and HPR60 use a harmonic drive transmission that’s small, simple, and dependable.

What are the TQ system’s specs?

Up to 300 watts of assist, 50Nm of torque, 360Wh battery

What’s the max assist speed?

28mph in the US, 25kph in EU & AU, 45kph in NZ , other markets subject to local speed regulations.

What is the difference between the Trek Central app and the TQ app?

The Trek app does everything the TQ app does, including motor tuning customization, range estimations, and general e-system information. In addition, the Trek app includes tire pressure recommendations, service reminders, useful navigation and range features, activity tracking, and more!

Where can I learn more about the Trek Central app?

Follow the link below to read the Trek Central FAQ.

Learn more

Can I connect Domane+ SLR to my Garmin or other device?

Yes! You can pair most Bluetooth or ANT+ cycling computers.

Does it have wiring for lights?

All bikes come with the TQ SmartBox installed. It has output ports for front light, rear light, aux 12, and electronic shifting.

Will Trek have all TQ spare parts in stock?

Trek will stock TQ parts that are used on Domane+ SLR, as well as the optional Range Extender battery, harness, and wire.

For AXS and Di2 extension cord equipped bikes that run the rear derailleur off the TQ battery, will the bike still shift after the battery is dead?

Yes! The “dead” battery will supply about 300 shifts to the rear derailleur, even though it no longer has the power to run the motor.

Are replacement/extra batteries available?

Yes, Trek distribution centers will stock TQ batteries. Due to hazmat shipping regulations, batteries cannot be returned.

How much does the battery weigh?

1,835g

Can the battery be charged when it is removed from the bike?

Yes. There is a charge level indicator on the battery with five bars and an optical switch. Cover the bar on the end, and the rest will light up according to the current charge level.

How long does the battery take to charge?

Approximately two hours.

Will the battery be damaged if it is plugged in too long?

No, it will just stop charging when it is full. However, never leave a charging battery unattended.

Will the battery be damaged if it discharges all the way?

No, but you should charge it. The battery can be damaged by storing it completely empty. If you aren’t going to ride the bike for three months or more, keep the battery charged above 30%.

Are there any other special instructions for the battery?

Please note that the battery will only last to about 15% capacity the first time it is depleted. So don’t be alarmed if the range on your first ride is a little shorter than expected. After the first full depletion and subsequent charging, the battery management system will “learn” what it needs to know and will deplete all the way to 0% on future rides.

Also note that any time the battery reaches less than 10% charge, the motor output will be reduced to 110 watts. The battery level indicator will flash to indicate Low Battery mode.

How accurate is the TQ power meter?

While the TQ power meter is accurate enough for the TQ system to provide smooth, natural assist, it is not accurate enough to provide athletic training data. For training purposes, we recommend a pedal-based power meter system.

Is there an optimum cadence range for the TQ motor?

Yes - the torque vs. cadence curves are flattest between 60-90 RPM, and peak torque begins to fall off at around 95 RPM.

Do I need to service the TQ motor?

The TQ motor only needs firmware updates, which are completed by a Trek retailer.

What is the range?

Range varies significantly depending on many factors such as rider weight, assist level, tire choice, riding surface, terrain, and more. With that in mind, you can expect about 60miles / 97km with the internal battery and about 90miles / 145km with the optional Range Extender.

How many assist modes are there?

There are three assist modes.

How do I cycle through the assist modes?

There are mode-change buttons mounted to the shifters, so you don’t have to take your hands off the controls to shift modes.

Can I customize the assist behavior?

Yes. Both the Trek Central and TQ apps allow you to adjust max power, assist factor, and pedal response per assist level. If you don’t like your changes, it’s easy to reset back to the factory settings.

Is there a walk assist?

Not for Domane+ SLR.

Will the e-system work in extreme temperatures?

Follow the temperature range guidelines in the Quick Start guide.

How do you get the Range Extender?

Through your local Trek retailer. Range Extender batteries (5289555) are not eligible for return by the retailer due to hazmat shipping regulations. Each retailer will set their own policy regarding customer returns of Range Extender batteries.

Do I need any other parts for Range Extender?

You’ll also need the power cable (5289576) and retention strap (5299107) this will now include four button head cap fasteners (W575056), if not, contact customer care.

How much does the Range Extender weigh?

How much does the Range Extender weigh?

How much extra range do you get?

It is 160Wh, which gets you approximately 40% additional range

Can I ride Domane+ SLR with only the Range Extender and no battery?

Yes! This also allows you to fly with Domane+ SLR by leaving the main battery behind and taking the 160Wh Range Extender in your carry-on. Check with your airline before traveling to confirm compliance with regulations.

How do I remove the main battery?

This job is not for the faint of heart, but an experienced home mechanic can remove the battery in 15-30 minutes. Remove the drive unit cover, remove the drive unit, remove the screws that hold the battery charge port in place, remove the battery. To put it back together sans battery, re-install the charge port bolts, re-install the drive unit, then re-install the motor cover. Sound like too much work? Your local Trek retailer is happy to help.

How long does it take the Range Extender to charge?

Approximately one hour.

Are all sizes compatible with Range Extender?

Yes!

Is the Range Extender compatible with any bottle cage?

We strongly recommend using the Bontrager Side Load cage (5324465) and the retention strap (5325177). Other cages may work, but we have not tested them. Always use the retention strap.