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The Procaliber 8 is a cross-country mountain bike built for hot laps and singletrack. It confidently rolls the fine line between race-ready and pocket-friendly with an alloy frame that's built with modern geometry for handling fast corners and rough sections of trail while keeping you ready to sprint up climbs. A 12-speed Shimano SLX and XT drivetrain and 120 mm RockShox Recon Gold fork seal the deal with all the gears and rock-smoothing comfort you need.

The Procaliber 8 is a cross-country mountain bike built for hot laps and singletrack. It confidently rolls the fine line between race-ready and pocket-friendly with an alloy frame that's built with modern geometry for handling fast corners and rough sections of trail while keeping you ready to sprint up climbs. A 12-speed Shimano SLX and XT drivetrain and 120 mm RockShox Recon Gold fork seal the deal with all the gears and rock-smoothing comfort you need.

Trek

Trek Procaliber 8 Matte Mercury

£1,300.00
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Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

No Quibble Returns

Online/ Mail Order Returns:
  • If for any reason you are not satisfied, you can return any item ordered via mail order provided that the goods are complete with all relevant packaging in an unused and re-saleable condition within 14 days of the date of shipment for a refund or an exchange. It's that simple.
  • We make no charge for returns - there is no restocking fee
  • Returned goods must be unused, in a saleable condition and in their original packaging with all labels still attached. Please note that items showing signs of wear or those that have been engraved, altered, resized, or damaged in any way cannot be accepted for return.
  • We cannot accept returns on clothing that has been personalised e.g. with name printing
  • We will credit the card we have on file for you this may take up to 10 working days to appear as cleared funds
  • If the original payment was via PayPal we will credit the PayPal account that the order was placed with
  • Value of goods only will be refunded.
  • For the purpose of hygiene, shorts, knicks and tights with a seatpad cannot be returned

NOTE: Please do not tape up, or attach labels direct to the retail packaging, please wrap the product first.

  • Goods must be returned within 14 days of receipt.
  • Goods must be in original packaging.
  • Goods must not be fitted or used.
  • Goods must be accompanied with a copy of your Original Receipt and aCover note with your name, address, reason for return, explaining if you would like a exchange or refund

If you return something due to it not fitting or being suitable, you will need to pay the postage costs to return it to us.

If you return something due to it being faulty we refund up to £10 carriage for bikes & frames and £5 for smaller items. If your return exceeds this amount please contact us and we can arrange collection for you. Please state a date and collection address (not Saturday or Sunday) where the goods can be collected from.

We recommend you use recorded delivery or registered post to return items so as to cover yourself against loss.

Customers outside of the UK must follow the instructions belowalong with our standard returns procedure.

To help us deal with your return to us quickly and efficiently you must mark all returns as RETURNED GOODS – FAILED SALE. This must be clearly marked on the customs information document ( CN22 and/ or CN 23) on the outside of the packaging. Failure to do so may result in the goods being refused at customs in the UK and so being returned to the sender.

If you have paid import duty for goods received, and subsequently return the goods to us, it should be possible for you to claim a refund of duties from your local Customs Authority. To do this, you will need to show them proof of duty paid and proof of export (e.g. certificate of posting) when claiming your refund.

Should you have any further queries on duties payable/refundable, please contact your local Customs Authority.

Damaged Goods

Before you sign for your goods make sure you are satisfied the contents are not damaged.

If in any doubt write: "GOODS DAMAGED"

IMPORTANT: If you sign that the item as 'has been received in good condition' you will have no claim later if the product is found to be damaged.

Damaged goods must be reported within 24 hours of receipt.

Warranty & Warranty Returns

We never want an item to fail but we recognise that failures can happen. When you buy wih Pedal Revolution you can have total piece of mind and know that we will give you issue our full attention. Our team work with suppliers and brands to ensure any warranty case is handled with the upmost care and is processed as quickly as possible.

Warranty items need to be returned to us at the below address with the package clearly marked as "Warranty" so that we can send them to the supplier to start the warranty procedure - warranty cases are handled by the brand or supplier of the goods and normally have a 1-3 week turn around.

Warranty items must be returned with a copy of your original receipt (the is a requirement of the brands/ suppliers).

No monies can be refunded until an item is accepted for warranty by the brand/ supplier

Returns Address

Returns Dept
Pedal Revolution
63-67 Bethel Street
Norwich
Norfolk
NR2 1NR

Trek Procaliber 8 Matte Mercury

Season:2026

Brand:Trek

Code:57370GRY

It's right for you if...

You want to dive into XC racing on a hardtail that's built to soar up climbs and stay composed through the rough stuff. You want to save some dough with a sturdy alloy frame, and don't mind upgrading your components over time.

The tech you get

A lightweight Alpha Platinum Aluminium hardtail frame with modern XC geometry and 148 mm boost spacing for stiff support under power. 120 mm of trail-smoothing front suspension from a RockShox Recon Gold RL fork with DebonAir spring, Motion Control damper and lockout. A clean shifting blend of 12-speed Shimano XT and SLX components, Tubeless-Ready Bontrager Kovee wheels, a Bontrager Line dropper post with internal routing and hydraulic disc brakes.

The final word

When you're ready to take on race day, reach for the Procaliber 7. This alloy hardtail has a speedy attitude with modern cross-country geometry that's dialled for hammering up climbs and keeps its composure on loose descents.

Why you'll love it

  1. You get modern geometry and 120 mm of front suspension that keeps you in the attack on climbs and crushing confidently on descents
  2. It balances the accessible price of an alloy hardtail with the performance of its carbon cohorts
  3. You get the perfect blend of components with Shimano SLX and XT shifting and hydraulic brakes
  4. Its Tubeless Ready 29 in wheels keep rolling resistance down while helping fight flats
  5. Internal cable routing keeps your ride quiet, reduces maintenance and looks sleek
Technical Information

*Please note – spec applies to all sizes unless listed separately

Frame

Alpha Platinum Aluminium, tapered head tube, internal routing, BSA 73, hidden rack and kickstand mounts, UDH, Boost148, 12 mm thru axle

Fork

RockShox Recon Gold RL, DebonAir spring, Motion Control damper, lockout, tapered steerer, 42mm offset, Boost110, 15 mm Maxle Stealth, 120mm travel

Max compatible fork travel

130 mm (540 mm axle-to-crown)

Hub front

Shimano TC500 alloy, CentreLock, 110x15 mm thru axle

Hub rear

Shimano TC500 alloy, CentreLock, 148x12 mm thru axle

Skewer rear

Bontrager Switch thru axle, removable lever

Rim

Bontrager Kovee, double-wall, Tubeless-Ready, 28-hole, 23 mm width, Presta valve

Tyre

Maxxis Rekon Race, tubeless ready, EXO casing, folding bead, 60 tpi, 29x2.40"

Tyre part

Bontrager TLR sealant, 180 ml/6 oz

Rim strip

Bontrager TLR

Max tyre size

Frame: 29x2.40", Fork: See manufacturer

Shifter

Shimano SLX M7100, 12-speed

Rear derailleur

Shimano XT M8100, long cage

*Crank

Size:S , M
E*thirteen Helix, 30T steel ring, 73 mm spindle length, 52 mm chainline, 170 mm length

Size:ML , L , XL
E*thirteen Helix, 30T steel ring, 73 mm spindle length, 52 mm chainline, 175 mm length

Bottom bracket

Shimano BB-MT501 BSA

Cassette

Shimano SLX M7100, 10-51T, 12-speed

Chain

Shimano SLX M7100, 12-speed

Pedal

VP-536 nylon platform

Max. chainring size

1x: 34T (55 mm chain line), min 30T (52 mm chain line)

Saddle

Verse Short, chromoly rails, 145 mm width

*Seatpost

Size:S , M
Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 31.6 mm, 310 mm length

Size:ML , L
Bontrager Line Dropper, 150mm travel, MaxFlow, internal routing, 31.6 mm, 410 mm length

Size:XL
Bontrager Line Dropper, 170 mm travel, MaxFlow, internal routing, 31.6 mm, 450 mm length

*Handlebar

Size:S , M
Bontrager Comp, alloy, 31.8 mm, 5 mm rise, 720 mm width

Size:ML , L , XL
Bontrager Rhythm Comp, alloy, 31.8 mm, 15 mm rise, 750 mm width

Grips

Trek Line Comp, nylon lock-on

*Stem

Size:S
Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 50 mm length

Size:M , ML
Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 60 mm length

Size:L
Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 70 mm length

Size:XL
Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 80 mm length

Head set

Semi-integrated, sealed cartridge bearing, alloy cups, 1-1/8" top, 1.5" bottom

Brake

Shimano hydraulic disc, MT4100 lever, MT410 calliper

*Brake rotor

Size:S , M , ML , L , XL
Shimano RT54, CentreLock, 160 mm

Size:S , M , ML , L , XL
Shimano RT54, CentreLock, 180 mm

Rotor size

Max brake rotor sizes – Frame: 180 mm, Fork: see fork manufacturer

Weight

M - 12.78 kg / 28.18 lbs (with TLR sealant, no tubes)

Weight limit

This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).

Sizing Information

How tall are you?

To measure your height, stand up straight, barefoot, with your back, heels, shoulders and head all touching a wall. While looking straight ahead, place a book or straight edge on your head and slowly push it against the wall. Your straight edge should be parallel with the floor. Mark the spot where the bottom of the book is touching the wall. The distance from the marked spot to the floor is your height.

What is your inside leg?

How to measure: Stand barefoot with your back straight and against a wall. Tuck a ruler or something that extends to the floor between your legs. Using both hands, and keeping it level, pull the ruler up into your crotch as if you were sitting on the saddle. Measure the distance from the top edge of the ruler to the ground to find your inside leg measurement. Your inside leg is very important to your final bike size so please measure carefully.

Sizing

size-table
SizeRider HeightInseam
S

155 - 165 cm

5'1" - 5'5"

74 - 78 cm

29" - 31"

M

165 - 176 cm

5'5" - 5'9"

79 - 83 cm

31" - 33"

ML

173 - 180 cm

5'8" - 5'11"

81 - 86 cm

32" - 34"

L

177 - 188 cm

5'10" - 6'2"

84 - 89 cm

33" - 35"

XL

188 - 195 cm

6'2" - 6'5"

89 - 91 cm

35" - 36"

Geometry

All measurements provided in cm unless otherwise stated.

Sizing table
Frame size letterWheel sizeA —Seat tubeB —Seat tube angleEffective seat tube angleC —Head tube lengthD —Head angleE —Effective top tubeF —Bottom bracket heightG —Bottom bracket dropH —Chainstay lengthI —OffsetK —WheelbaseL —StandoverM —Frame reachN —Frame stack
S29"39.071.0°74.3°9.067.0°57.730.96.443.04.3111.074.740.561.4
M29"42.071.5°74.3°9.067.0°59.830.96.443.04.3113.574.943.061.4
ML29"44.072.0°74.3°9.067.0°61.330.96.443.54.3115.575.844.561.4
L29"46.072.5°74.3°9.067.0°62.830.96.443.54.3117.176.346.061.4
XL29"51.073.0°74.3°12.067.0°67.730.96.444.04.3122.779.150.064.2
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