Cellularline Steering Tube Mount 17-20.5mm – 360° Quick Release for Interphone iCase ProCase UniCase Cases
CHF 16.00
CHF 19.00
-15%
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Cellularline Steering Tube Mount 17-20.5mm – 360° Quick Release for Interphone iCase ProCase UniCase Cases
CHF 16.00
CHF 19.00
-15%
Taxes included.
Shipping calculated at checkout.
Code: SMSTEERING17
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Shipping notice: truck drivers' strike in Italy
Updated 19/10/2026
Since 16 October, truck drivers protesting against high diesel prices have been blocking roads and ports in Southern Italy (Campania, Calabria, Sicily, Puglia, Basilicata), and the protest could spread to the rest of the country. The strike affects all our shipments, in Italy and abroad: Poste Italiane is currently not collecting parcels, while BRT and DHL are collecting as usual but deliveries may be delayed in some areas.
- Italy we ship with BRT and DHL · possible delivery delays
- European Union for now we ship with DHL only · possible delays
- Non-EU countries (customs) shipments temporarily suspended: they will leave as soon as Poste Italiane resumes collections
We apologise for any inconvenience and thank you for your patience.
Shipping outside the European Union — duties payable by the recipient
This order ships outside the European Union and is subject to customs clearance in the destination country.
Export formalities and costs from Italy are on us and are already included in the price.
Import duties, taxes and clearance fees in the destination country are payable by the buyer. They are not included in the product price or the shipping cost, and we cannot calculate them: they are set by the customs authority of the destination country.
The carrier will not release the parcel until the recipient pays these charges. If the shipment is refused or the charges are left unpaid, the parcel is returned to us and shipping, return and any customs costs are deducted from the refund.
This order ships outside the European Union and is subject to customs clearance in the destination country.
Export formalities and costs from Italy are on us and are already included in the price.
Import duties, taxes and clearance fees in the destination country are payable by the buyer. They are not included in the product price or the shipping cost, and we cannot calculate them: they are set by the customs authority of the destination country.
The carrier will not release the parcel until the recipient pays these charges. If the shipment is refused or the charges are left unpaid, the parcel is returned to us and shipping, return and any customs costs are deducted from the refund.
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The Cellularline SMSTEERING17 steering stem mount is the official Interphone support designed to attach iCase, ProCase, and UniCase smartphone holders directly to the motorcycle's steering stem. Compatible with stems with a diameter between 17 and 20.5 mm, it installs with a screw without special tools and features a quick release/attachment system with 360° rotation for optimal phone positioning. Ideal for sport and naked motorcycles where handlebar space is limited.
✓ Strengths
- Compatible with Interphone iCase, ProCase, and UniCase cases – dedicated attachment system
- Stem diameter 17-20.5 mm – ideal for most sport, naked, and adventure motorcycles
- Quick release/attachment – insert and remove the case with one click
- 360° rotation – vertical or horizontal orientation as desired
- Screw fixing to the stem – stable and secure even at high speeds
- Installation without special tools – quick and direct assembly
- Compact design – does not obstruct steering and does not interfere with controls
Technical features
| Brand | Cellularline / Interphone |
| Product code | SMSTEERING17 |
| Type | Steering tube mount |
| Compatible stem diameter | From 17 to 20.5 mm |
| Compatible cases | Interphone iCase, ProCase, UniCase |
| Attachment system | Quick-release |
| Rotation | 360° |
| Fixing | Screw-on to the steering stem |
| Ideal use | Sport, naked, adventure motorcycles with exposed steering stem |
| Color | Black |
| EAN | 8018080430879 |
⚠️ Important notes:
• This mount is an optional accessory — the smartphone holder case (iCase, ProCase, or UniCase) is not included and must be purchased separately.
• Check the diameter of your motorcycle's steering stem before purchasing: it must be between 17 and 20.5 mm.
• Not compatible with Interphone CRAB, ARMOR, and MASTER line mounts, which use a different 17 mm ball attachment system.
• For motorcycles with a smaller steering stem diameter (13-15 mm), there is a specific model with a different code.
• Installation is done by inserting the mount into the steering stem hole and tightening the locking screw. It is recommended to check that it does not interfere with steering rotation once installed.
• This mount is an optional accessory — the smartphone holder case (iCase, ProCase, or UniCase) is not included and must be purchased separately.
• Check the diameter of your motorcycle's steering stem before purchasing: it must be between 17 and 20.5 mm.
• Not compatible with Interphone CRAB, ARMOR, and MASTER line mounts, which use a different 17 mm ball attachment system.
• For motorcycles with a smaller steering stem diameter (13-15 mm), there is a specific model with a different code.
• Installation is done by inserting the mount into the steering stem hole and tightening the locking screw. It is recommended to check that it does not interfere with steering rotation once installed.
Recommended accessories
- Interphone ProCase – universal waterproof smartphone case
- Interphone iCase – specific case for iPhone with touch access
- Interphone UniCase – universal version for all smartphones
- Interphone anti-vibration extension – to reduce vibrations transmitted to the smartphone
Who is it perfect for?
The SMSTEERING17 mount is the ideal choice for motorcyclists who ride sport, naked, or adventure bikes with an exposed steering stem and want to have their smartphone always visible for GPS navigation, music, or notifications. Perfect for those who already use Interphone iCase, ProCase, or UniCase cases and need a secure and practical mounting point, different from the classic handlebar attachment. Also ideal for those whose handlebars are already occupied by other accessories (handguards, aftermarket mirrors, etc.) and need to use the steering stem as an alternative mounting point.
🛡️ Warranty and quality – Moon Bike S.r.l.
Original Cellularline / Interphone product. Moon Bike S.r.l. is an authorized reseller based in Cercola (NA). All Cellularline products are covered by the official manufacturer's warranty and comply with current European regulations.
Original Cellularline / Interphone product. Moon Bike S.r.l. is an authorized reseller based in Cercola (NA). All Cellularline products are covered by the official manufacturer's warranty and comply with current European regulations.
Frequently asked questions
Shipping times +
Shipping within 24-48 working hours in Italy. Tracking via SMS/email. Free pickup at our store in Cercola (NA), ready within 1 hour.
Returns and refunds +
You have 14 days from delivery to return the item without giving a reason. Free returns for faulty items. Full details
Payment methods +
Credit cards (Visa, Mastercard, American Express), PayPal, Apple Pay, Google Pay, Shop Pay, Klarna (pay in 3) and cash on delivery.
Warranty and authenticity +
All products come with a 24-month legal warranty. We are an Official Piaggio Group Dealer: original spare parts are certified with a verifiable OEM code.
Technical support +
Our technical team is available on WhatsApp +39 392 456 1248 Mon-Fri 9:00–13:30 / 14:30–18:00 (Italian time), or by email.