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crawlster®D18 TUNING-KIT – RC4WD 1/18-Mighty Minis

The ulitimate suspension and steering-Tuning for all  RC4WD 1/18 ScaleCrawlers

  • 4,5x longer outer tuning springs with optimally adapted spring force
  • "S" = soft design for standard-/series weight vehicles
  • full utilisation of the max. possible damper travel of 10 mm – clearly optimized entanglement
  • new, pre-assembled shock absorber mounts for axles and chassis
  • more ground contact and traction – significantly improved driving and crawling characteristics
  • no obstruction on the inside of the curves Knuckles through damper-rodends

  • tighter curve radii / neutr. Ackermann

  • preassembled tie rods – adjustable neutral/toe-in/toe-out
  • BTA – no tie rod in front of the axle

  • preassembled short steering link – adjustable, better function & look
  • simply to install – pre-assembled components and illustrated mounting guide

  • colour: black

44,80 €

  • 0,1 kg
  • SOFORT-VERSAND am Bestelltag – Mo. - Fr. bis 15:00 Uhr1

Option Parts

crawlster®D18 Tuning-springs MEDIUM

"M" = medium hard design with +17% increased spring pressure for use in vehicles with heavier construction than series - e.g. with RoofRacks, attachments, stronger LiPos, trailers, self-made bodies etc.. Use for example on the rear axle only. 

Delivery as (2) individual springs w/o further components: Set of 2 springs for 1 axle 

6,90 €

  • 0,1 kg
  • SOFORT-VERSAND am Bestelltag – Mo. - Fr. bis 15:00 Uhr1

Price notice for European and International 


For orders from / deliveries to Germany or Eu-countries (e.g. AT, ES, F...), the sales price includes VAT. Shipping costs extra.


For orders from / deliveries to non-EU countries and international (e.g. CH, UK, USA...) the sales price is net. Discounted shipping costs extra.

Bei Bestellungen aus / Lieferungen nach Deutschland oder in Länder der EU (z.B. AT, ES, F…) versteht sich der Verkaufspreis inkl. MwSt. und zzgl. Versandkosten.


Bei Bestellungen aus / Lieferungen in Nicht-EU-Länder und International (z.B. CH, UK, USA…) versteht sich der Verkaufspreis Netto zzgl. vergünstigter Versandkosten.


Exceptionally nice video of 

RCscale101 showing 2x full scale 1/18 RC4WD defenders with crawlster®D18 tuning kit and reinforced springs - shot on Iceland


With friendly permission



The crawlster®D18 TUNING-KIT for steering and shocks 

is fully compatible to the stock RC4WD "Ultimate Mini Scale Shocks (40mm)"



? >

The Steering-Joints of the 

crawlster®D18 TUNING-KIT are 



The Springs of the crawlster®D18 TUNING-KIT are not compatible to the 


 Features and Benefits

crawlster®D18 TUNING-KIT

for "Ultimate Mini Scale Shocks"



 Shock Material Machined Billet Aluminium  Machined Billet Aluminium
 Scale-look  YES  YES
 Length 40 mm  40 mm 
 Travel +3 mm * +3 mm *
 Springs external internal
 Spring-length approx. 35 mm approx. 20 mm
 Spring-force more linear more progressive


 YES – 

 Costs (Set of 4)

€ 39,80 (2 x € 32 =)  € 64,00

* in comparison to the stock "Ultimate Mini Scale Shocks (40mm)"

crawlster®D18 TUNING-KIT: the 4,5 x longer outer tuning springs optimize the  impact / rebound behavior of the standard dampers

Standard dampers:  the deflection of the short internal springs begins far above the vehicle weight (grey), the spring pressure increases disproportionately in the further course and will limit the damper travel to 7 mm when the springs are completely compressed. 

crawlster®D18 TUNING-KIT: the deflection of the external 4.5 x longer outer tuning springs (S=soft) starts below the vehicle weight (grey), the spring pressure remains also with increasing compression almost linear and allows full damper travel of 10 mm

Readings per (1) spring; vehicle-weight incl. LiPo w/o axles and wheels = approx.290 g / 4 = ca. 72g / spring

The unique crawlster®D18-Joint ensures an unrestricted steering angle and significantly improves the curve performance

  • unique crawlster®D18-Joint
  • improved steering geometry due to utilization of the maximum possible turning angle of the universal shafts
  • no obstruction on the inside of the curves Knuckles through damper-RodEnds
  • tighter curve radii / neutr. Ackermann
  • adjustable toe-in / toe-out
  • BTA – no tie rod in front of the axle

crawlster® D18-components are shown in YELLOW – also available in BLACK.

 The crawlster®D18 TUNING-KIT contains all components needed for the conversion:

  • 4x TUNING-SPRINGS – hardened stainless steel
  • 4x pre-assembled crawlster®D18-JOINTS, 4x spring-/distance-CLIPS for shock mounts
  • 1x preassembled TIE ROD – adjustable toe-in / toe-out
  • 1x preassembled SHORT STEERING ROD – Servo-/Neutralspur adjustable (OPTION)
  • all necessary SCREWS / NUTS (M2) for mounting
  • 2x Tuning-STICKER and illustrated MOUNTING INSTRUCTIONS


with all 1/18
RC4WD Gelände Chassis

  • w/ D90 Body Set (Blue) – Z-RTR0039
  • w/ D90 Body Set (Black) – Z-RTR0038
  • w/ BLACK ROCK Body Set – Z-RTR0037
  • w/ BLACK ROCK Body Set (orange) – Z-RTR0048
  • w/ BLACKJACK Body Set – Z-RTR0036
  • w/ BLACK HAWK Hard Body Set - Z RTR0059

The crawlster®D18 TUNING-KIT creates the decisive conditions for the fundamental optimization of dampers + steering




Here are 2 additional TIPS ....

...for the cautious

Mount the front/lower links"inside"

to get more freedom of steering - 

exspecially when using more voluminous tires

such as the Goodyear WRANGLER MT/R 1 

...for the brave ones

Carefully* (!), laterally obliquely milled out the bone slits with a cutting disc in the lower area by about 1-1.5 mm – brings another, visibly improved steering angle (* at your own risk)

The crawlster®D18 Tuning-KIT is suitable for all series of RC4WD® 1/18 Gelände chassis with Yota front axles. Subject to technical change. crawlster® is DPMA protected. All rights reserved. Reproduction / distribution even in part only with express permission. 

The vehicles shown on this site are not part of the crawlster®D18 Tuning-KIT and must be purchased separately.


© Product-visuals: crawlster®

This website has been compiled with the utmost care. Nevertheless, no guarantee can be given for the correctness of the information contained. Any liability for damages arising directly or indirectly from the use of this website or the vehicles / systems offered is excluded - unless they are based on intent or gross negligence.