OneUp Components Bash Guide V2
OneUp Components Bash Guide V2 ISCG05 Purple
OneUp Components Bash Guide V2 ISCG05 Turquoise
OneUp Components Bash Guide V2 ISCG05 Red
OneUp Components Bash Guide V2 ISCG05 Orange
OneUp Components Bash Guide V2 ISCG05 Blue
OneUp Components Bash Guide V2 ISCG05 Green
OneUp Components Bashguide V2 Exploded
OneUp Components Bash Guide V2 Guide Flipped
OneUp Components Bash Guide V2 Guide Colours

Bash Guide ISCG05 V2


Regular price£94.50
VAT included. Shipping calculated at checkout.

The best bash guide on the market! If you're running a 1x drive train on your long, low slack enduro bike, you will benefit from an OneUp bash guide. Designed to fit the standard ISCG05 mounts fitted to most enduro bike frames, the OneUp Bash Guide can be installed with one allen key and without the need to remove your cranks.

The top guide makes a huge difference to chain retention. Even if you're running a narrow wide chain ring and a clutch rear mech, a dropped chain can still happen, especially when the chain is getting toward the end of its life. For the small amount of weight (around 100g), the extra security is a must for racers. If you do somehow manage to dislodge your chain, the tool less top guide can be hinged to get the chain back on.

If you've ever hit your chain ring on a stump or fallen tree, you've probably felt the chain dig in and grip. The OneUp guide takes this resistance and grip away, in the same way as skateboard deck rails help the board slide along a ledge.

Three bash guards are included to suit different chain ring sizes from 28-36T, and you can replace the top guide with a choice of blue, green, orange, red, turquoise or purple.

If you never hit your chan ring off anything, we also stock a bashless ISCG05 chain guide. There's also an underbash kit which fits the Deviate Highlanders and Claymores if all you need is a bash guard.

UK Delivery

Orders Over £50 – Free (Royal Mail)

Orders Under £50 – £4.95 (Royal Mail)

FedEx £5.95

Our standard delivery time is 3–5 days. We do our very best to deliver orders within this time, but occasionally there are delays outwith our control, caused by either suppliers or couriers.

UK Bike Delivery

We offer free UK delivery on all bikes unless bought through a Ride To Work Scheme.

We don't currently deliver complete bikes outside the UK.

Custom-built bikes can be delivered in kit form (for you to assemble) – we can include shipping to your country in your quote.

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Bash Guide ISCG05 V2 Specification

  • Weight: 90g 28-30T, 105g 32-34T, 110g 36T.
  • Capacity: 28-36T.
  • Chainline: 7.5 mm adjustment.
  • Mount: ISCG05.
  • Colour: Black top guide piece included.
  • Material: 7075 aluminium, top guide glass reinforced thermoplastic.


  • Tool-less upper guide flip.
  • Install without removing your crank.
  • Single tool install and adjustment.
  • Boost compatible.
  • Oval Compatible.
  • Black Stainless Steel hardware.
  • Includes 3 bash plates (28-30T, 32-34T, 36T).
  • Patented US 10,053,188 Other Patents Pending.


  1. Remove top guide by removing the front top guide nut with a 4 mm hex (never adjust the rear T25 bolt).
  2. Set slider in the highest position
  3. Hold backplate directly against ISCG05 tabs. Check for clearance between the back side of the bash plate/guide and the bike frame (use included 2.5 mm spacers if necessary to space the backplate away from the frame).
  4. Rotate backplate until slider adjustment bolt is directly above the crank axle and torque bolts to 5Nm
  5. With crankset and chain installed, use spacer shim block to measure clearance between backplate and chain
  6. Determine the corresponding number of chain line shims required
  7. If more than 5 shims are required, install the supplied 2.5 mm washers behind the backplate and return to step 2
  8. Assemble top guide with spacers and tighten bolt to 3Nm
  9. Insert a 4 mm hex through the hole in the inner top guide, loosen the height adjustment bolt and lower the tool onto the chain. Torque to 3 nm to set height.

Bash Guard Replacement

  1. Remove Bash Guide from bike.
  2. Remove bolt retaining clip from rear bash plate bolt by pushing a 4 mm hex through the bolt from the backside of the guide.
  3. Remove Bash bolts using a 5 mm hex.
  4. Select desired bash plate and reinstall bash bolts to 6 nm.
  5. Reinstall bolt retaining clip on the rear bash plate bolt.
  6. Reinstall Bash Guide onto bike.

More Chain Guides

Customer Reviews

Based on 6 reviews
ISCG05 V2 Bash Guard

Great Bash Guard

Jim W.
Easy to fit

Great bit of kit with everything you need to fit easily

Ryan M.
5 Stars

5 Stars

Quality product

First order from 20Twenty, and first one up product. Excellent service, great product range have ordered again

Great Product, Rapid delivery

Part was delivered the day after it was ordered. Great product, amazing service.
Will be using 20Twenty again.

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