SKU: 44217997731

ISM PN 4.0 L-255 W-125 Cr-Mo Rail

Sale price$3455.23 Regular price$3839.14
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Ships within 48 hours · Estimated delivery Aug 20 - Aug 25

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Description

ISM PN 4.0 L-255 W-125 Cr-Mo RailNEW for 2020! The ISM PN4. 0 is the newest offering in the Performance Narrow category of saddles. Similar in design to the award winning ISM PN3. 0, we increased the sit bone contact points 5mm to accommodate a range of pelvic body positions. Rider response told us some cyclists wanted a 125mm saddle to allow for more relaxed pelvis tilt related to road and gravel cycling. Like the other PN saddles, the PN4. 0 offers superb thigh and hamstring

NEW for 2020!  The ISM PN4.0 is the newest offering in the Performance Narrow category of saddles.  Similar in design to the award-winning ISM PN3.0, we increased the sit bone contact points 5mm to accommodate a range of pelvic/body positions.  Rider response told us some cyclists wanted a 125mm saddle to allow for more relaxed pelvis tilt related to road and gravel cycling. 

Like the other PN saddles, the PN4.0 offers superb thigh and hamstring clearance.  This allows for more rider body movement around the seat and is great for diving into fast corners.

Like all ISM saddles, the PN4.0 is nose-less and designed to remove pressure from soft tissue, ensuring maximum blood flow, no genital numbness, and a healthier, more enjoyable ride.

Key Features:

  • 5mm wider than the PN3.0 to accommodate a greater range of sit bone width
  • Tapered-edge mold design for incredible comfort
  • Auto-racing inspired air vent chassis

Commonly Used For:

  • Gravel/Road bikes
  • Time Trial bikes

Tech Specs:

  • Category: Performance Narrow
  • Length: 255mm
  • Width: 125mm
  • Padding: 30-Series Foam
  • Rails: Proprietary Stainless Steel Alloy

This saddle is not recommended for cyclists who ride with a high seat position or those who ride very forward on the extreme front of the saddle (the front arms or the nose of a traditional saddle). The recommended seat height for these saddles calls for a 32-37 degree knee bend for the rider. If you ride with a minimal bend or a straight leg a different ISM saddle is recommended for you.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 44217997731

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Azhar
Fort Morgan, US
★★★★★ 5
Exactly what I needed!
Style: Classic, Style: Classic
My old one broke and for some reason I couldn’t log onto their website to order a pair, so I’m glad I found these here! They fit perfectly!
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Reviewed in the United States on January 10, 2025
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Johnniqua Terrell
Natrona Heights, US
★★★★★ 5
Okay
Style: Classic
Toddler son broke the original tip being adventurous .now I’m back on regular schedule.somehow while using the tube pops off as if the grove isn’t deep enough to lock in . I now have to hold the tube while flossing so it doesn’t pop off into my mouth
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Reviewed in the United States on April 7, 2025
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Teresa Spevey Jackson
Carnegie, US
★★★★★ 5
Cleans teeth better than regular floss
Style: Classic
Works wonders
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Reviewed in the United States on March 20, 2025
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Re
Carnegie, US
★★★★★ 3
Disappointed
Style: Classic
Water comes out to fast. Don’t even get a minute worth of flossing.
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Reviewed in the United States on April 13, 2024
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JoAnn P.
Bozeman, US
★★★★★ 5
Burst makes great products
Style: Classic
I have the burst toothbrush and the burst water flosser. Both are excellent products. Products ship quickly and they are well made
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Reviewed in the United States on January 17, 2024

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