OneUp Components ISCG 05 Underbash

ISCG05 Underbash

$58.99 USD

If you're not looking for chain retention or your bike has an integrated chain guide, you can still add some bash protection with the OneUp ISCG05 Underbash.

The Underbash includes 3 different sizes of bash plate for compatibility with chainrings from 28-36T. Designed for frames with 2 ISCG05 tabs only (Evil, Rocky Mountain, etc). If your bike has three ISCG05 tabs, check with the frame manufacturer to ensure the lower tabs are strong enough for a bash application. Failure to do so could result in frame damage.

FEATURES

  • Install without removing your crank
  • Single tool install and adjustment
  • Boost compatible
  • Oval Compatible
  • Stainless Steel hardware 
  • Includes 3 bash plates (28-30T, 32-34T, 36T)

    SPECS   

    Weight:  68g 32-34T
    Capacity: 28-36T 
    Chainline: 2.5mm adjustment 
    Mount: ISCG05 2-Bolt ONLY
    Color: Black
    Material: 7075 aluminum, glass reinforced thermoplastic

    COMPATIBILITY
    • Not compatible with E-bikes.

     

    UNDERBASH SETUP INSTRUCTIONS

    1. Hold backplate directly against ISCG05 tabs. Check for clearance between the back side of the bashplate and the bike frame (use included 2.5mm spacers if necessary to space the backplate away from the frame).
    2. Rotate backplate to desired location and torque bolts to 5Nm

     

    BASH REPLACEMENT INSTRUCTIONS

    1. Remove Underbash from bike
    2. Remove bolt retaining clip from rear bash plate bolt by pushing a 4mm hex through the bolt from the backside of the Underbash.
    3. Remove Bash bolts using a 5mm hex
    4. Select desired bash plate and reinstall bash bolts to 6Nm
    5. Reinstall bolt retaining clip on the rear bash plate bolt
    6. Reinstall Underbash onto bike 
    In stock! Usually ships within 24 hours.
    Shipping and Returns

    Orders over $99 ship for free and should arrive in 4–5 business days, once shipped.

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    Return unused and unopened items within 30 days for a full refund—return shipping is free.

    Orders are shipped duty and tariff free from our headquarters in Squamish, BC, Canada.

    Learn more on our shipping and returns page.

    Overall rating: 4.895349 / 5 from 86 reviews.

    AI Generated Review Summary

    The ISCG05 Underbash by OneUp offers a beefy and adjustable bashguard compatible with various chainring sizes. Customers appreciate its sleek appearance, simple design, and ease of installation. The product is praised for its great quality and includes spare bash guards for different sizes.

    Summary topics

    • Chainring Compatibility: 10%
    • Aesthetic Appeal: 7%
    • Design Simplicity: 7%
    • Bash Guard Quality: 11%
    • Size Range: 10%

    Review topics: [fit, size, quality, install, looks, design, protection, bash guard, chainring, bash, solution, rocks, bike, lever, chain, brainer, buy].

    Review highlights

    • "Solid quality, simple effective design." — John B.
    • "The bash guard is great and good quality." — Tim L.
    • "easy install, already saved the BB/chainring of my new bike a few times." — Isaac C.

    Reviews

    One Up Bash

    "I love this Bash. It is easy to install, weighs next to nothing and has saved my chain and chain ring so many times. One less thing to think about when I do questionable stuff on my bike."

    — Jamie A. (5/5)

    Does what it is supposed to.

    "Does exactly what it is supposed to do and is easy to install"

    — Scott M. (5/5)

    Underbash

    "Does the job"

    — Jay R. (4/5)

    Solid

    "Good additional protection for the rig, already saved my chainring and chain a few times."

    — Sebastian B. (5/5)

    It's a bash guard

    "Easy to install"

    — Abraham A. (5/5)

    Easy to install. Does its

    "Easy to install. Does its job."

    — Oscar L. (5/5)

    Bash guard

    "Great protection for my new carbon Yeti!"

    — Tim B. (5/5)

    Fits perfectly and install was

    "Fits perfectly and install was easy"

    — Brennan V. (5/5)

    Riding Bashless is like riding naked!

    "If you ride rocky, technical terrain like I do you’re going to smash your chain and chain ring more than you think. After needing to replace a chain and chain ring. I went searching for a bash guard. This guard protects my chain and chainring, and weighs next to nothing and has taken a lot of abuse over the last 5 years. It’s one of those parts that just does its job and you forget it’s there."

    — Jamie A. (5/5)

    The best ever lile always

    "The best ever lile always with one up"

    — Henry L. (5/5)

    Q&A

    Why shouldn't this be used on frames with 3 ISCG05 tabs? It would seem that you can mount this to the bottom 2 tabs.
    While it can be mounted we must assume the frame maker intended any bash device to be mounted to all 3 tabs. Reach out to the frame manufacturer for clearance prior to doing so.

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