OneUp Components Chain Guide ISCG05 V2
OneUp Components Top Guide Guide Turquoise
OneUp Components Top Guide Bird Flip Guide Black
OneUp Components ISCG05 Top Guide Green
OneUp Components Top Guide Iso Exploded Guide Black
OneUp Components Top Guide Iso Exploded Zoom Guide Black
OneUp Components Top Guide Guide Fitted
OneUp Components Top Guide All Colours

Chain Guide V2 ISCG05


Regular price£54.50
VAT included. Shipping calculated at checkout.

Eliminate dropped chains forever with the new OneUp Components Guide.

As the trend for lower and slacker bikes continues, 'Little bikes' are getting more and more capable every day. Revised for 2019 the OneUp Guide uses simple, one tool installation and adjustment as well as an all new tool less flip.

At only 40g the OneUp Chain Guide weighs less than a sip of water.

Why do I need a guide and a Narrow Wide Chainring?

NW rings are awesome, but they're not perfect, and every once in a while you can drop a chain while riding. On a social ride, this means getting dropped by your friends. But when racing an Enduro, a dropped chain can cost you the podium, which is why almost every EWS pro runs both a chain guide and narrow wide chainring.

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.

International Orders

Due to the number of delivery options, the best way to get a shipping price is to add what you would like to your basket and begin the checkout. You'll be able to see the shipping price before you checkout.

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IOSS - EU Orders Under £130

Tax and duties will be calculated at the checkout. Once you have paid 20Twenty, you will have nothing to pay in your delivery country.

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1. Remove top guide by removing the front top guide nut with a 4 mm hex (never adjust the rear T25 bolt).
2. Set the slider in the highest position.
3. Hold backplate directly against ISCG05 tabs. Check for clearance between the back side of the 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 3Nm to set height.


  • Tool less upper guide flip.
  • Install without removing your cranks.
  • Single tool install and adjustment (4 mm hex).
  • Boost compatible.
  • Oval Compatible.
  • Black Stainless Steel hardware.
  • Patented US 10,053,188 Other Patents Pending.


  • Weight: 40g.
  • Capacity: 26-38T.
  • Chainline: 7.5 mm adjustment.
  • Mount: ISCG05.
  • Colour: Black top guide piece included.
  • Material: 7075 aluminium, top guide glass reinforced thermoplastic.

More Chain Guides

Customer Reviews

Based on 2 reviews
Lee D.
One up chain guide v2

2nd one up chain guide I've owned, fitted to a Santa Cruz Megatower, 5 minute job, looks great and does the job well,

Robert C.
5 Stars

5 Stars

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