{"id":68750,"date":"2024-08-29T17:00:00","date_gmt":"2024-08-29T15:00:00","guid":{"rendered":"http:\/\/f206e12b-b29a-447d-ade2-7dc85ccb5044"},"modified":"2024-08-29T17:25:37","modified_gmt":"2024-08-29T15:25:37","slug":"new-trek-procaliber-features-a-massive-hole-in-the-top-tube-to-smooth-your-ride","status":"publish","type":"rss_feed","link":"https:\/\/c01.purpledshub.com\/cyclingplus\/rss_feed\/new-trek-procaliber-features-a-massive-hole-in-the-top-tube-to-smooth-your-ride\/","title":{"rendered":"New Trek Procaliber features a massive hole in the top tube to smooth your ride\u00a0"},"content":{"rendered":"

IsoBow compliance system replaces IsoStrut on new Procaliber <\/p>

By <\/p>

Published: Thursday, 29 August 2024 at 15:00 PM<\/p>

\n\n

Trek’s latest Procaliber hardtail mountain bike has a new frame compliance system based around a large hole in the top tube.<\/p>

Called IsoBow, the compliance system replaces Trek\u2019s IsoStrut design and it’s said to be lighter and simpler than its predecessor.<\/p>

Elsewhere, the new Procaliber keeps up with cross-country mountain bike<\/a> trends, with fork travel increasing from 100mm to 120mm and a more aggressive frame geometry. <\/p>

Trek says the bike has been designed with anyone in mind from rugged gravel riders to World Cup XC racers.\u00a0<\/p>

The Trek Procaliber starts at \u00a31,200 for the base aluminium Procaliber 8 with the high-end, carbon-framed Procaliber 9.7 AXS topping the range at \u00a34,250. A frameset is also available for \u00a31,400.<\/p>

International pricing is to be confirmed.<\/p>

IsoBow frame compliance<\/h2>
The IsoBow does look simpler than the IsoStrut it replaces. – Trek<\/figcaption><\/figure>
Trek says the new IsoBow frame compliance design is lighter and simpler than the IsoStrut system it replaces, and that its athletes can\u2019t feel a difference in compliance between the two systems in a blind test.<\/p>
The new design utilises flex in the rear triangle to smooth out trail imperfections. <\/p>
The seat stays continue past the seat post allowing them to flex and dissipate vibrations.<\/p>
$\"Trek$
The new system leaves a large hole in the crossbar. – Trek<\/figcaption><\/figure>
The Lapierre Prorace CF 9.9<\/a> has a similar system, which is a bit like GT’s Triple Triangle Design.<\/p>
Only carbon Procaliber models feature IsoBow. <\/p>
$\"Trek$
Trek says reduced vibrations lead to less fatigue over time. – Trek<\/figcaption><\/figure>
The new frame has a floating brake rotor mount similar to Trek\u2019s full-suspenionSupercaliber XC bike. The mount is said to isolate braking forces from the seat stay flex to increase comfort and provide more consistent braking.<\/p>
Trek says the new Procaliber frame is on average 150g lighter than the previous generation across the sizes.<\/p>
Increased travel and clearance<\/h2>
$\"Trek$
Trek has designed the Procaliber for elite competition. – Trek<\/figcaption><\/figure>
The new Procaliber now uses a 120mm suspension fork<\/a>. This is in keeping with other cross-country hardtails<\/a> which have increased suspension travel in recent years.<\/p>
Also following a trend in XC mountain bikes, the new Procaliber can accommodate wider mountain bike tyres<\/a>, measuring up to 2.4in.\u00a0<\/p>
Inside the front triangle is room for two water bottles, which should be enough to keep you hydrated on longer riders or in marathon races.\u00a0<\/p>
Trek hasn\u2019t given the bike any frame storage, though there is a mount on the underside of the crossbar where you could mount a small pack.<\/p>
Modern XC geometry<\/h2>
$\"Trek$
The Procaliber has grown longer and has a slacker head angle. – Trek<\/figcaption><\/figure>
Trek has also modernised the Procaliber\u2019s geometry. \u00a0It now features a slacker 67-degree head angle compared to the 68.8-degree angle of the previous Procaliber.<\/p>
The effective seat tube angle has also steepened to 74.3 degrees from 73.8 degrees to maintain an efficient pedalling position.<\/p>
Reach has increased, too, growing 10mm to 460mm in a size large.<\/p>
Trek says all this has resulted in a bike with calmer handling and increased confidence which should lead to increased speed.<\/p>
Trek Procaliber spec and price<\/h2>
Procaliber 6<\/h3>
$\"Trek$
The Procaliber 6 is the entry-level aluminium frame. – Trek<\/figcaption><\/figure>
Fork:<\/strong> RockShox Judy Silver, 120mm<\/li>
Drivetrain:<\/strong> Shimano XT<\/li>
Brakes:<\/strong> Shimano MT200<\/li>
Wheels:<\/strong> Bontrager Kovee<\/li>
Tyres:<\/strong> Bontrager Sainte-Anne Pro XR 2.4in<\/li>
Price:<\/strong> \u00a31,200<\/li><\/ul>
Procaliber 8<\/h3>
$\"Trek$
The Procaliber 8 features an SLX shifter and better brakes than the Procaliber 6. – Trek<\/figcaption><\/figure>
Fork:<\/strong> RockShox Recon Gold RL, 120mm<\/li>
Drivetrain: <\/strong>Shimano XT<\/li>
Brakes:<\/strong> Shimano MT410<\/li>
Wheels:<\/strong> Bontrager Kovee<\/li>
Tyres:<\/strong> Bontrager Sainte-Anne Pro XR 2.4in<\/li>
Price: <\/strong>\u00a31,400<\/li><\/ul>
Procaliber 9.5 Gen 3<\/h3>
$\"Trek$
The Procaliber 9.5 is the entry-level carbon bike – Trek<\/figcaption><\/figure>
Fork:<\/strong> RockShox Judy Gold, 120mm<\/li>
Drivetrain: <\/strong>Shimano Deore 12-speed<\/li>
Brakes:<\/strong> Shimano MT200<\/li>
Wheels: <\/strong>Bontrager Kovee<\/li>
Tyres: <\/strong>Bontrager Sainte-Anne Pro XR 2.4in<\/li>
Price:\u00a0<\/strong>\u00a31,950<\/li><\/ul>
Procaliber 9.6 Gen 3<\/h3>
$\"Trek$
All Procalibers come with Bontrager Sainte-Anne Pro XR 2.4in tyres. – Trek<\/figcaption><\/figure>
Fork: <\/strong>RockShox Reba RL, 120mm<\/li>
Drivetrain: <\/strong>Shimano SLX 12-speed<\/li>
Brakes: <\/strong>Shimano MT500<\/li>
Wheels: Bontrager Kovee Comp 25<\/li>
Tyres: <\/strong>Bontrager Sainte-Anne Pro XR 2.4in<\/li>
Price:\u00a0<\/strong>\u00a32,350<\/li><\/ul>
Procaliber 9.7 AXS Gen 3<\/h3>
$\"Trek$
The Procaliber 9.7 AXS features SRAM’s GX Eagle AXS Transmission – Trek<\/figcaption><\/figure>
Fork:<\/strong> RockShox SID, 120mm<\/li>
Drivetrain: <\/strong>SRAM GX Eagle AXS Transmission<\/li>
Brakes:<\/strong> SRAM Level Bronze 4-piston<\/li>
Wheels: <\/strong>Bontrager Kovee Elite 30<\/li>
Tyres:<\/strong> Bontrager Sainte-Anne Pro XR 2.4in<\/li>
Price:<\/strong> \u00a34,250<\/li><\/ul> <\/body><\/html>\n
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